Bump prometheus-client from 4.2.1 to 4.2.2

Bumps [prometheus-client](https://github.com/prometheus/client_ruby) from 4.2.1 to 4.2.2.
- [Release notes](https://github.com/prometheus/client_ruby/releases)
- [Changelog](https://github.com/prometheus/client_ruby/blob/main/CHANGELOG.md)
- [Commits](prometheus/client_ruby@v4.2.1...v4.2.2)

---
updated-dependencies:
- dependency-name: prometheus-client
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -16,7 +16,7 @@ GEM
     octokit (8.0.0)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
-    prometheus-client (4.2.1)
+    prometheus-client (4.2.2)
     public_suffix (5.0.3)
     rake (13.1.0)
     rexml (3.2.6)