chore: remove manual version/changelog checklist items from PR template

[farhan]

Summary

• Removes Version bumped and Changelog record added checklist items from the PR template
• Both are now automated via semantic-release, so manual contributor action is no longer needed and keeping them would be misleading

Test plan

• Verify the PR template no longer shows these items when opening a new PR

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.17%. Comparing base (1f30ddc) to head (60efb1c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #56   +/-   ##
=======================================
  Coverage   82.17%   82.17%           
=======================================
  Files          48       48           
  Lines        1419     1419           
  Branches      110      110           
=======================================
  Hits         1166     1166           
  Misses        221      221           
  Partials       32       32           

Flag	Coverage Δ
unittests	82.17% <ø> (ø)

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[Copilot]

Pull request overview

This PR updates the repository’s pull request template by removing two checklist items that are no longer manually applicable now that versioning and changelog updates are automated via semantic-release.

Changes:

• Removed the “Version bumped” checklist item from the PR template.
• Removed the “Changelog record added” checklist item from the PR template.

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