chore(deps-dev): bump zircote/swagger-php from 4.9.0 to 4.9.1

Bumps [zircote/swagger-php](https://github.com/zircote/swagger-php) from 4.9.0 to 4.9.1.
- [Release notes](https://github.com/zircote/swagger-php/releases)
- [Changelog](https://github.com/zircote/swagger-php/blob/master/Changelog.md)
- [Commits](zircote/swagger-php@4.9.0...4.9.1)

---
updated-dependencies:
- dependency-name: zircote/swagger-php
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>