Bump rector/rector in the development-dependencies group (#3334)

Bumps the development-dependencies group with 1 update: [rector/rector](https://github.com/rectorphp/rector).


Updates `rector/rector` from 2.0.15 to 2.0.16
- [Release notes](https://github.com/rectorphp/rector/releases)
- [Commits](rectorphp/rector@2.0.15...2.0.16)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-version: 2.0.16
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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Author: dependabot[bot]