Merge pull request #56 from alphagov/dependabot/bundler/prometheus-client-4.2.4

Author: govuk-ci

Gemfile.lock

@@ -18,7 +18,7 @@ GEM
     octokit (9.2.0)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
-    prometheus-client (4.2.3)
+    prometheus-client (4.2.4)
       base64
     public_suffix (6.0.1)
     rspec (3.13.0)