Merge branch 'docs/exclude-docs-from-job' into 'master'

Exclude docs-only branches from job

See merge request gitlab-org/gitlab-ce!30005

.gitlab/ci/frontend.gitlab-ci.yml

@@ -72,6 +72,7 @@ gitlab:assets:compile pull-cache:
   except:
     - master@gitlab-org/gitlab-ce
     - master@gitlab-org/gitlab-ee
+    - /(^docs[\/-].*|.*-docs$)/
 
 .compile-assets-metadata:
   extends: .dedicated-runner