Trigger-ui-tests shift nightly cron to 02:15 UTC

[Kasinhou]

What

Shift the nightly UI-test trigger schedule in .github/workflows/trigger-ui-tests.yml:

   schedule:
-    - cron: '0 5 * * *'
+    - cron: '15 2 * * *'

This is the only change — a single cron line.

Why

• GitHub Actions cron runs in UTC. '0 5 * * *' fires at 05:00 UTC, which is 07:00 local in summer (CEST/UTC+2) and 06:00 in winter (CET/UTC+1). That lands the run right when the team arrives and needs the self-hosted runner.
• Moving to '15 2 * * *' (02:15 UTC) means ~04:15 local (summer) / ~03:15 local (winter), finishing well before the workday even with GitHub's scheduler queue delay and the ~60 min suite.
• Using :15 instead of :00 avoids the top-of-the-hour scheduler congestion that was delaying the run by 20-30 minutes.

Impact

No functional change to the job itself — only when the nightly trigger fires. workflow_dispatch and workflow_call are unaffected.

[Copilot]

Pull request overview

This pull request adjusts the scheduled trigger time for the nightly “Trigger UI Tests for All Customer Branches” GitHub Actions workflow so it runs earlier (02:15 UTC) to avoid workday runner contention and top-of-hour queue delays.

Changes:

• Updated the workflow schedule cron from 0 5 * * * to 15 2 * * * (UTC).

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