Merge branch 'aa-changelog-for-database-changes' into 'master'

Changelog for database changes

See merge request gitlab-org/gitlab!44443

doc/development/changelog.md

@@ -31,7 +31,10 @@ the `author` field. GitLab team members **should not**.
 
 - Any change that introduces a database migration, whether it's regular, post,
   or data migration, **must** have a changelog entry, even if it is behind a
-  disabled feature flag.
+  disabled feature flag. Since the migration is executed on [GitLab FOSS](https://gitlab.com/gitlab-org/gitlab-foss/), 
+  the changelog for database schema changes should be written to the
+  `changelogs/unreleased/` directory, even when other elements of that change affect only GitLab EE.
+
 - [Security fixes](https://gitlab.com/gitlab-org/release/docs/blob/master/general/security/developer.md)
   **must** have a changelog entry, without `merge_request` value
   and with `type` set to `security`.