Reminder about doc updates for feature flags

danger/feature_flag/Dangerfile

@@ -177,6 +177,8 @@ module Tooling
           You're about to [release the feature with the feature flag](https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20Flag%20Roll%20Out.md#optional-release-the-feature-with-the-feature-flag).
           This process can only be done **after** the [global rollout on production](https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20Flag%20Roll%20Out.md#global-rollout-on-production).
           Please make sure in [the rollout issue](#{feature_flag.rollout_issue_url}) that the preliminary steps have already been done. Otherwise, changing the YAML definition might not have the desired effect.
+
+          If applicable, include necessary documentation updates for this feature in the merge request.
         SUGGEST_COMMENT
 
         mr_line = feature_flag.find_line_index("default_enabled: true")