fix(deps): bump commitizen from 3.31.0 to 4.1.1 in /pr-diff-bot

Bumps [commitizen](https://github.com/commitizen-tools/commitizen) from 3.31.0 to 4.1.1.
- [Release notes](https://github.com/commitizen-tools/commitizen/releases)
- [Changelog](https://github.com/commitizen-tools/commitizen/blob/master/CHANGELOG.md)
- [Commits](commitizen-tools/commitizen@v3.31.0...v4.1.1)

---
updated-dependencies:
- dependency-name: commitizen
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

pr-diff-bot/requirements.txt

@@ -4,7 +4,7 @@ gitpython==3.1.44
 openai>=1.0.0,<2.0.0
 requests==2.32.3
 python-semantic-release==8.7.0
-commitizen==3.31.0
+commitizen==4.1.1
 boto3>=1.34.0  # Required for AWS Bedrock support
 openai>=1.0.0
 requests>=2.31.0