Fix dead link in docs README

Repository size limit docs were introduced by
https://gitlab.com/gitlab-org/gitlab-ee/commit/9cd2f585b0ddd74de01256d9b247245a44eaa49f

[ci skip]

doc/README.md

@@ -69,7 +69,7 @@
 - [High Availability](administration/high_availability/README.md) Configure multiple servers for scaling or high availability.
 - [Container Registry](administration/container_registry.md) Configure Docker Registry with GitLab.
 - [Multiple mountpoints for the repositories storage](administration/repository_storages.md) Define multiple repository storage paths to distribute the storage load.
-- [Repository restrictions](administration/repository_restrictions.md) Define size restrictions for your repositories to limit the space they occupy in your storage device. Includes LFS objects.
+- [Repository restrictions](user/admin_area/settings/account_and_limit_settings.md#repository-size-limit) Define size restrictions for your repositories to limit the space they occupy in your storage device. Includes LFS objects.
 
 ## Contributor documentation