Merge branch 'disable-group-notifications' into 'master'

adds release item for disabling mention notifications

See merge request gitlab-com/www-gitlab-com!36844

data/release_posts/unreleased/disable-group-mentionings.yml

+# Release post data file for secondary items
+# DELETE THESE COMMENTS BEFORE MERGING
+#
+# Note:
+# - All description entries support markdown. Use it as you do for a regular markdown file.
+#   Just make sure the indentation is respected.
+#
+## Entries:
+#
+# - name: "Amazing Feature" # feature name: make it consistent, use the same name here, in the features.yml file, and in the docs
+# - available_in: [core, starter, premium, ultimate]
+# - gitlab_com: false # apply this for features not available in GitLab.com
+# - documentation_link: 'https://docs.gitlab.com/ee/#amazingdoc' # up-to-date documentation - required
+# - image_url: '/images/x_y/feature-a.png' (optional for secondary items)
+# - image_noshadow: true # this eliminates double shadows for images that already have a shadow (optional for secondary items)
+# - video: 'https://www.youtube.com/embed/enMumwvLAug' # overrides image_url - use the "embed" link (not required)
+# - reporter: pm1 # GitLab handle of the user adding the feature block in the list (not the feature author)
+# - stage: stagename # DevOps stage the feature belongs to
+#          Example => stage: secure (lowercase, omit the leading 'devops::' part of the label)
+#                     see https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/contributing/issue_workflow.md#stage-labels
+# - categories:
+# - - 'category name'
+# - - 'optional second category'
+# - - 'etc'
+# - issue_url: 'https://gitlab.com/gitlab-org/gitlab-ce/issues/12345' # link to the issue on GitLab.com where the feature is discussed and developed - required but replaceable with epic_url or mr_url
+# - issueboard_url: 'https://gitlab.com/group/project/boards/123?=' # link to the issue board for the feature (not required)
+# - epic_url: 'https://gitlab.com/groups/gitlab-org/-/epics/123' # link to the epic for the feature (not required)
+# - mr_url: 'https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/123' # link to the MR that introduced the feature (not required)
+# - webpage_url: '/features/gitlab-geo/' # link to the marketing webpage for a given feature (not required)
+#
+# Read through the Release Posts Handbook for more information:
+# https://about.gitlab.com/handbook/marketing/blog/release-posts/
+#
+# ATTENTION: Leave these instructions and the example blocks (with their inline comments)
+# up until the time the review starts. Once you've added an item, and **only by then**,
+# please remove the inline comment to indicate that the item has been updated, thus
+# we can clear up the comments on the go and easily spot what's missing.
+###
+
+features:
+  secondary:
+    - name: "Disable group mentions"
+      available_in: [core, starter, premium, ultimate]
+      documentation_link: 'https://docs.gitlab.com/ee/user/group/#disabling-group-mentions'
+      reporter: gweaver
+      stage: plan
+      categories:
+        - 'Issue Tracking'
+      issue_url: 'https://gitlab.com/gitlab-org/gitlab/issues/21301'
+      image_url: '/images/12_6/disable-group-mentions.png'
+      mr_url: 'https://gitlab.com/gitlab-org/gitlab/merge_requests/20184'
+      description: |
+        Mentioning a group with a large number of members can quickly lead to a high volume of unwanted notifications. To avoid this, you can now enable a group-level setting to prevent members from receiving notifications when the group is mentioned in an issue or merge request.
+
+        Thanks [@fh1ch](https://gitlab.com/fh1ch) and Siemens!
\ No newline at end of file