[ISSUE #4810] Fix stale workflow failure and adjust cron with UTC time

[Pil0tXia]

Fixes #4810

Motivation

https://github.com/apache/eventmesh/actions/runs/8548456034

Modifications

Correct keyword and adjust time to 2:30 UTC+8.

Documentation

• Does this pull request introduce a new feature? (no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
• If a feature is not applicable for documentation, explain why?
• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 16.20%. Comparing base (6594588) to head (d77aa85).

❗ Current head d77aa85 differs from pull request most recent head f8312ea. Consider uploading reports for the commit f8312ea to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #4811   +/-   ##
=========================================
  Coverage     16.20%   16.20%           
  Complexity     1710     1710           
=========================================
  Files           857      857           
  Lines         30883    30883           
  Branches       2685     2685           
=========================================
  Hits           5005     5005           
  Misses        25410    25410           
  Partials        468      468           

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