ci: update release candidate in pull request when changes are available

[zimeg]

Changelog

N/A - But we hope to continue autogenerated changesets alongside a faster "launch" sequence 🚀

Summary

This PR updates release candidates in pull requests when changes are available 🐙 ✨

Preview

• WIP

Testing

• WIP

Notes

• This moves all terminal commands for a release to GitHub workflows for more simple and confident process. We'll update internal runbooks to create a release from GitHub as well if changes seem alright. I'll leave comments more below!

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.66%. Comparing base (afcb85d) to head (009d97e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #552      +/-   ##
==========================================
+ Coverage   71.64%   71.66%   +0.02%     
==========================================
  Files         225      225              
  Lines       19074    19074              
==========================================
+ Hits        13665    13669       +4     
+ Misses       4202     4200       -2     
+ Partials     1207     1205       -2     

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