Comment out PR trigger on cron CI.

[IAlibay]

Changes made in this Pull Request:

• Add comments missed from [CI] MDAnalysis self-dependency build fix #4502

PR Checklist

• Tests?
• Docs?
• CHANGELOG updated?
• Issue raised/referenced?

Developers certificate of origin

• I certify that this contribution is covered by the LGPLv2.1+ license as defined in our LICENSE and adheres to the Developer Certificate of Origin.

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📚 Documentation preview 📚: https://mdanalysis--4705.org.readthedocs.build/en/4705/

[github-actions]

Linter Bot Results:

Hi @IAlibay! Thanks for making this PR. We linted your code and found the following:

There are currently no issues detected! 🎉

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.87%. Comparing base (d11a1ef) to head (9b36416).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4705   +/-   ##
========================================
  Coverage    93.87%   93.87%           
========================================
  Files          173      173           
  Lines        21422    21422           
  Branches      3979     3979           
========================================
  Hits         20110    20110           
  Misses         858      858           
  Partials       454      454           

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