Merge branch '211809-add-a-note-about-ci-assets-required-by-outside-projects' into 'master'

Add a note about CI assets required by outside projects

Closes #211809

See merge request gitlab-org/gitlab!27609

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

@@ -37,6 +37,8 @@
     paths:
       - webpack-report/
       - assets-compile.log
+      # We consume these files in GitLab UI for integration tests:
+      # https://gitlab.com/gitlab-org/gitlab-ui/-/blob/e88493b3c855aea30bf60baee692a64606b0eb1e/.storybook/preview-head.pug#L1
       - public/assets/application-*.css
       - public/assets/application-*.css.gz
     when: always