Fix links to gitlab-housekeeper gem README

doc/.vale/gitlab/InternalLinksCode.yml

@@ -9,4 +9,4 @@ link: https://docs.gitlab.com/ee/development/documentation/styleguide/index.html
 level: error
 scope: raw
 raw:
-  - '\[[^\]]*\]\([\.\/]*(ee|app|bin|config|db|data|fixtures|lib|locale|qa|scripts|spec)\/'
+  - '\[[^\]]*\]\([\.\/]*(ee|app|bin|config|db|data|fixtures|gems|lib|locale|qa|scripts|spec)\/'

doc/development/search/advanced_search_migration_styleguide.md

@@ -444,7 +444,7 @@ We choose to use GitLab [required stops](../database/required_stops.md) as a saf
 backwards compatibility for indices that have not been fully migrated. We
 [document this in our upgrade documentation](../../update/index.md#upgrading-to-a-new-major-version).
 
-[GitLab Housekeeper](../../../gems/gitlab-housekeeper/README.md)
+[GitLab Housekeeper](https://gitlab.com/gitlab-org/gitlab/-/blob/master/gems/gitlab-housekeeper/README.md)
 is used to automate the cleanup process. This process includes
 marking existing migrations as obsolete and deleting obsolete migrations.
 When a migration is marked as obsolete, the migration code is replaced with
@@ -472,7 +472,7 @@ deployments.
 
 ### Process for marking migrations as obsolete
 
-Run the [`Keeps::MarkOldAdvancedSearchMigrationsAsObsolete` Keep](../../../gems/gitlab-housekeeper/README.md#running-for-real)
+Run the [`Keeps::MarkOldAdvancedSearchMigrationsAsObsolete` Keep](https://gitlab.com/gitlab-org/gitlab/-/blob/master/gems/gitlab-housekeeper/README.md#running-for-real)
 manually to mark migrations as obsolete.
 
 For every migration that was created two versions before the last required stop,
@@ -498,7 +498,7 @@ The MR assignee must:
 
 ### Process for removing obsolete migrations
 
-Run the [`Keeps::DeleteObsoleteAdvancedSearchMigrations` Keep](../../../gems/gitlab-housekeeper/README.md#running-for-real)
+Run the [`Keeps::DeleteObsoleteAdvancedSearchMigrations` Keep](https://gitlab.com/gitlab-org/gitlab/-/blob/master/gems/gitlab-housekeeper/README.md#running-for-real)
 manually to remove obsolete migrations and specs. The Keep removes all but the most
 recent obsolete migration.