ci(pipeline): pin .NET 10 SDK to global.json version (#3010)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 2e18b190-bdba-4d76-97af-b191dbd6c960

Author: gavinbarron

.azure-pipelines/ci-build.yml

@@ -69,7 +69,7 @@ extends:
         - task: UseDotNet@2
           displayName: 'Use .NET 10'
           inputs:
-            version: 10.x
+            useGlobalJson: true
 
         # Install the nuget tool.
         - task: NuGetToolInstaller@1