Update dependency ubuntu to v26

.github/workflows/ci-main.yml

@@ -42,7 +42,7 @@ permissions:
 jobs:
   plan:
     name: "Control / Planning"
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     outputs:
       scope: ${{ steps.plan.outputs.scope }}
       base_sha: ${{ steps.plan.outputs.base_sha }}
@@ -104,15 +104,15 @@ jobs:
   velnor-lane-admission:
     name: "Control / Velnor admission"
     if: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Velnor lane omitted for fork
         run: |
           echo '::notice::Velnor lane omitted for fork pull request; validating GitHub lane only.'
   policy:
     name: Policy
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 20
     # Trust invariant: this job runs the base branch's validator against the
     # audited tree under pull_request_target. It holds `contents: read` only,
@@ -714,7 +714,7 @@ jobs:
     name: ci-required
     if: ${{ always() }}
     needs: [plan, velnor-lane-admission, policy, github-gradle, velnor-gradle, github-gradle-buildsrc, velnor-gradle-buildsrc, github-gradle-graphql-datetime-dgs-autoconfigure, velnor-gradle-graphql-datetime-dgs-autoconfigure, github-gradle-graphql-datetime-dgs-starter, velnor-gradle-graphql-datetime-dgs-starter, github-gradle-graphql-datetime-kickstart-spring-boot-starter, velnor-gradle-graphql-datetime-kickstart-spring-boot-starter, github-gradle-graphql-datetime-spring-boot-autoconfigure, velnor-gradle-graphql-datetime-spring-boot-autoconfigure, github-gradle-graphql-datetime-spring-boot-common, velnor-gradle-graphql-datetime-spring-boot-common, github-gradle-graphql-datetime-spring-boot-starter, velnor-gradle-graphql-datetime-spring-boot-starter, github-gradle-graphql-java-datetime, velnor-gradle-graphql-java-datetime, github-gradle-samples-dgs-webmvc, velnor-gradle-samples-dgs-webmvc, github-gradle-samples-kickstart-webflux, velnor-gradle-samples-kickstart-webflux, github-gradle-samples-kickstart-webmvc, velnor-gradle-samples-kickstart-webmvc, github-gradle-samples-spring-boot-webmvc, velnor-gradle-samples-spring-boot-webmvc]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Validate generated stack results
@@ -1177,7 +1177,7 @@ jobs:
     name: "Control / Required"
     if: ${{ always() }}
     needs: [ci-required]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Mirror CI / Required

.github/workflows/ci-policy.yml

@@ -16,7 +16,7 @@ permissions:
 jobs:
   policy:
     name: Policy
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 20
     # Trust invariant: this job runs the base branch's validator against the
     # audited tree under pull_request_target. It holds `contents: read` only,

.github/workflows/ci-pr.yml

@@ -41,7 +41,7 @@ permissions:
 jobs:
   plan:
     name: "Control / Planning"
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     outputs:
       scope: ${{ steps.plan.outputs.scope }}
       base_sha: ${{ steps.plan.outputs.base_sha }}
@@ -103,7 +103,7 @@ jobs:
   velnor-lane-admission:
     name: "Control / Velnor admission"
     if: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Velnor lane omitted for fork
@@ -607,7 +607,7 @@ jobs:
     name: ci-required
     if: ${{ always() }}
     needs: [plan, velnor-lane-admission, github-gradle, velnor-gradle, github-gradle-buildsrc, velnor-gradle-buildsrc, github-gradle-graphql-datetime-dgs-autoconfigure, velnor-gradle-graphql-datetime-dgs-autoconfigure, github-gradle-graphql-datetime-dgs-starter, velnor-gradle-graphql-datetime-dgs-starter, github-gradle-graphql-datetime-kickstart-spring-boot-starter, velnor-gradle-graphql-datetime-kickstart-spring-boot-starter, github-gradle-graphql-datetime-spring-boot-autoconfigure, velnor-gradle-graphql-datetime-spring-boot-autoconfigure, github-gradle-graphql-datetime-spring-boot-common, velnor-gradle-graphql-datetime-spring-boot-common, github-gradle-graphql-datetime-spring-boot-starter, velnor-gradle-graphql-datetime-spring-boot-starter, github-gradle-graphql-java-datetime, velnor-gradle-graphql-java-datetime, github-gradle-samples-dgs-webmvc, velnor-gradle-samples-dgs-webmvc, github-gradle-samples-kickstart-webflux, velnor-gradle-samples-kickstart-webflux, github-gradle-samples-kickstart-webmvc, velnor-gradle-samples-kickstart-webmvc, github-gradle-samples-spring-boot-webmvc, velnor-gradle-samples-spring-boot-webmvc]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Validate generated stack results
@@ -1065,7 +1065,7 @@ jobs:
     name: "Control / Required"
     if: ${{ always() }}
     needs: [ci-required]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Mirror CI / Required

.github/workflows/ci-unit-gradle.yml

@@ -101,7 +101,7 @@ jobs:
   verify-github:
     name: GitHub
     if: ${{ inputs.lane == 'github' && contains(format(',{0},', inputs.selected_units), format(',{0},', inputs.unit)) && (github.event_name == 'pull_request' || (github.ref == 'refs/heads/main' && (github.event_name == 'push' || github.event_name == 'schedule')) || (github.event_name == 'workflow_dispatch' && (github.event.inputs.runner == 'github' || github.event.inputs.runner == 'both' || github.event.inputs.runner == ''))) }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 45
     steps:
       - name: Mark CI job start

.github/workflows/maintenance.yml

@@ -26,7 +26,7 @@ jobs:
   prune-pr-cache:
     name: Prune closed-PR cache
     if: ${{ github.event_name == 'pull_request' || (github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/main' && inputs.pull_request_number != '') }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 15
     steps:
       - name: Delete merge-ref cache namespace
@@ -65,7 +65,7 @@ jobs:
   cache-budget:
     name: Cache retention
     if: ${{ github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 10
     permissions:
       contents: read

.github/workflows/nightly.yml

@@ -48,7 +48,7 @@ jobs:
   dispatch-ci-main:
     name: "Control / Dispatch ci-main"
     if: ${{ github.event_name != 'workflow_dispatch' || !inputs.simulate_failure }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     permissions:
       actions: write
@@ -74,7 +74,7 @@ jobs:
   nightly-red-to-signal:
     name: "Control / Nightly red-to-signal"
     if: ${{ github.event_name == 'workflow_dispatch' && inputs.simulate_failure }}
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Simulate nightly failure
@@ -87,7 +87,7 @@ jobs:
     name: "Control / Nightly red-to-signal"
     if: ${{ always() && needs.nightly-red-to-signal.result == 'failure' }}
     needs: [nightly-red-to-signal]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     permissions:
       contents: read
       issues: write