fix: align auto update time picker to the right #35621

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Summary

fix https://github.com/langgenius/dify/issues/35619

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Checklist

  • This change requires a documentation update, included: Dify Document
  • I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
  • I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
  • I've updated the documentation accordingly.
  • I ran make lint && make type-check (backend) and cd web && pnpm exec vp staged (frontend) to appease the lint gods
CUT
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Cutter Summary

In the Plugin Preferences modal, the auto-update time picker now sits flush against the right edge of its row, aligned with the timezone helper text below it.