Make codeowners behavior before / after 13.10 clearer

doc/user/project/merge_requests/approvals/settings.md

@@ -70,8 +70,14 @@ their own. To do this:
    it can't be changed at the project level.
 1. Select **Save changes**.
 
-Even with this configuration, [code owners](../../code_owners.md) who contribute
-to a merge request can approve merge requests that affect files they own.
+Depending on your version of GitLab, [code owners](../../code_owners.md) who commit
+to a merge request may or may not be able to approve the work:
+
+- In GitLab 13.10 and earlier, [code owners](../../code_owners.md) who commit
+  to a merge request can approve it, even if the merge request affects files they own.
+- In [GitLab 13.11 and later](https://gitlab.com/gitlab-org/gitlab/-/issues/331548),
+  [code owners](../../code_owners.md) who commit
+  to a merge request cannot approve it, when the merge request affects files they own.
 
 To learn more about the [differences between authors and committers](https://git-scm.com/book/en/v2/Git-Basics-Viewing-the-Commit-History),
 read the official Git documentation for an explanation.