build(deps-dev): bump zircote/swagger-php from 5.1.0 to 5.1.1

Bumps [zircote/swagger-php](https://github.com/zircote/swagger-php) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/zircote/swagger-php/releases)
- [Commits](zircote/swagger-php@5.1.0...5.1.1)

---
updated-dependencies:
- dependency-name: zircote/swagger-php
  dependency-version: 5.1.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]