ci: fix nightly release job conditional

[BobbieGoede]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This fixes the nightly release job conditional so it only checks the merge commit title and not the squashed commits in the commit body. This could incorrectly skip/prevent a release if the body contains one of the checked keywords.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (afc4183) 84.43% compared to head (5c62c83) 84.43%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #587   +/-   ##
=======================================
  Coverage   84.43%   84.43%           
=======================================
  Files          32       32           
  Lines        3752     3752           
  Branches      559      559           
=======================================
  Hits         3168     3168           
  Misses        584      584           

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