build(deps): bump repo-sync/pull-request from 2.6.2 to 2.12.1 (#75)

Bumps [repo-sync/pull-request](https://github.com/repo-sync/pull-request) from 2.6.2 to 2.12.1.
- [Release notes](https://github.com/repo-sync/pull-request/releases)
- [Commits](repo-sync/pull-request@v2.6.2...v2.12.1)

---
updated-dependencies:
- dependency-name: repo-sync/pull-request
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>