Merge branch 'update-docs-lint-image' into 'master'

Update docs lint image

See merge request gitlab-org/gitlab!68344

.gitlab/ci/docs.gitlab-ci.yml

@@ -44,7 +44,7 @@ docs-lint markdown:
     - .default-retry
     - .docs:rules:docs-lint
   # When updating the image version here, update it in /scripts/lint-doc.sh too.
-  image: registry.gitlab.com/gitlab-org/gitlab-docs/lint-markdown:alpine-3.13-vale-2.10.2-markdownlint-0.26.0
+  image: registry.gitlab.com/gitlab-org/gitlab-docs/lint-markdown:alpine-3.14-vale-2.10.4-markdownlint-0.28.1
   stage: test
   needs: []
   script: