build(deps-dev): bump rector/rector from 2.1.0 to 2.1.1 (OpenMage#4883)

Bumps [rector/rector](https://github.com/rectorphp/rector) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/rectorphp/rector/releases)
- [Commits](rectorphp/rector@2.1.0...2.1.1)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-version: 2.1.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]