Update deploy_on_release.yml to only run when a release is published

[saitcakmak]

Looks like releasing directly without first creating a draft release triggers on both "created" and "published". Since "published" also covers publishing a draft release, it should be the only rule we need.

[meta-codesync]

@saitcakmak has imported this pull request. If you are a Meta employee, you can view this in D87648588.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.99%. Comparing base (a33ea72) to head (1ad3a49).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3087   +/-   ##
=======================================
  Coverage   99.99%   99.99%           
=======================================
  Files         219      219           
  Lines       20887    20887           
=======================================
  Hits        20886    20886           
  Misses          1        1           

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[meta-codesync]

@saitcakmak merged this pull request in 8af234a.