Merge branch '39042-update-docs-for-filter-merge-request-approved-by-user' into 'master'

Update docs to include Filtering MR by 'Approved By'

Closes #39042

See merge request gitlab-org/gitlab!31159

doc/user/search/index.md

@@ -97,10 +97,19 @@ You can filter the **Issues** list to individual instances by their ID. For exam
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/9468) in [GitLab Starter](https://about.gitlab.com/pricing/) 11.9.
 
 To filter merge requests by an individual approver, you can type (or select from
-the dropdown) `approver` and select the user.
+the dropdown) **Approver** and select the user.
 
 ![Filter MRs by an approver](img/filter_approver_merge_requests.png)
 
+### Filtering merge requests by "approved by" **(STARTER)**
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/30335) in [GitLab Starter](https://about.gitlab.com/pricing/) 13.0.
+
+To filter merge requests already approved by a specific individual, you can type (or select from
+the dropdown) **Approved-By** and select the user.
+
+![Filter MRs by approved by](img/filter_approved_by_merge_requests_v13_0.png)
+
 ## Search history
 
 You can view recent searches by clicking on the little arrow-clock icon, which is to the left of the search input. Click the search entry to run that search again. This feature is available for issues and merge requests. Searches are stored locally in your browser.