Merge branch 'sh-fix-json-parsing-rspec-flaky' into 'master'

Fix update-tests-metadata CI step failing in master

Closes #216349

See merge request gitlab-org/gitlab!30937

lib/rspec_flaky/report.rb

@@ -19,7 +19,7 @@ module RspecFlaky
     end
 
     def self.load_json(json)
-      new(RspecFlaky::FlakyExamplesCollection.new(Gitlab::Json.parse(json)))
+      new(RspecFlaky::FlakyExamplesCollection.new(JSON.parse(json)))
     end
 
     def initialize(flaky_examples)