ci: parse releases_created output as JSON in publish job condition

[Mogyuchi]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.86%. Comparing base (0201719) to head (0d41ea6).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #79   +/-   ##
=======================================
  Coverage   87.86%   87.86%           
=======================================
  Files           8        8           
  Lines         981      981           
=======================================
  Hits          862      862           
  Misses        119      119           

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