Bump prometheus-client from 4.1.0 to 4.2.0

Bumps [prometheus-client](https://github.com/prometheus/client_ruby) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/prometheus/client_ruby/releases)
- [Changelog](https://github.com/prometheus/client_ruby/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_ruby/compare/v4.1.0...v4.2.0)

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

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

Gemfile

@@ -116,4 +116,4 @@ gem "openssl", "~> 3.1"
 # mail 2.8.0 breaks sendmail usage: https://github.com/mikel/mail/issues/1538
 gem "mail", "~> 2.7.1"
 
-gem "prometheus-client", "~> 4.1"
+gem "prometheus-client", "~> 4.2"

Gemfile.lock

@@ -280,7 +280,7 @@ GEM
     pg (1.5.3)
     pghero (3.3.3)
       activerecord (>= 6)
-    prometheus-client (4.1.0)
+    prometheus-client (4.2.0)
     public_suffix (5.0.1)
     puma (6.3.0)
       nio4r (~> 2.0)
@@ -528,7 +528,7 @@ DEPENDENCIES
   openssl (~> 3.1)
   pg
   pghero
-  prometheus-client (~> 4.1)
+  prometheus-client (~> 4.2)
   puma
   pundit (~> 2.3)
   questiongenerator (~> 1.1)