Bump prometheus-client from 4.2.3 to 4.2.4

Bumps [prometheus-client](https://github.com/prometheus/client_ruby) from 4.2.3 to 4.2.4.
- [Release notes](https://github.com/prometheus/client_ruby/releases)
- [Changelog](https://github.com/prometheus/client_ruby/blob/main/CHANGELOG.md)
- [Commits](prometheus/client_ruby@v4.2.3...v4.2.4)

---
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

@@ -411,7 +411,7 @@ GEM
     pp (0.6.2)
       prettyprint
     prettyprint (0.2.0)
-    prometheus-client (4.2.3)
+    prometheus-client (4.2.4)
       base64
     prometheus_exporter (2.2.0)
       webrick