Merge branch 'move_runner_endpoints_feature_category' into 'master'

Adding runner feature_category for Runner API

See merge request gitlab-org/gitlab!64828

lib/api/ci/runners.rb

@@ -7,7 +7,7 @@ module API
 
       before { authenticate! }
 
-      feature_category :continuous_integration
+      feature_category :runner
 
       resource :runners do
         desc 'Get runners available for user' do