feat: skip changelog check on release branches and enhance PR changelog validation

[cryptodev-2s]

Explanation

This PR introduces two key improvements to our changelog check workflow:

1. Skip Release Branches

   • Adds a branch filter to prevent the changelog check from running on release branches (release/*)

2. Enhanced Changelog Validation

   • Updates to the latest version of the changelog check workflow
   • Adds PR-specific validation that ensures each PR has its own entry in the changelog
     -> PR introducing the changes

References

Changelog

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes