Bump access-modifier-checker from 1.21 to 1.22

Bumps [access-modifier-checker](https://github.com/jenkinsci/lib-access-modifier) from 1.21 to 1.22.
- [Release notes](https://github.com/jenkinsci/lib-access-modifier/releases)
- [Commits](https://github.com/jenkinsci/lib-access-modifier/compare/access-modifier-1.21...access-modifier-1.22

)

---
updated-dependencies:
- dependency-name: org.kohsuke:access-modifier-checker
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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