Merge remote-tracking branch 'dev/13-7-stable' into 13-7-stable

ci_files/variables.yml

 ---
 variables:
   GITLAB_ELASTICSEARCH_INDEXER_VERSION: v2.8.0
-  GITLAB_VERSION: v13.7.8-ee
-  GITLAB_REF_SLUG: v13.7.8-ee
-  GITLAB_ASSETS_TAG: v13.7.8-ee
+  GITLAB_VERSION: v13.7.9-ee
+  GITLAB_REF_SLUG: v13.7.9-ee
+  GITLAB_ASSETS_TAG: v13.7.9-ee
   GITLAB_EXPORTER_VERSION: 7.1.2
   GITLAB_SHELL_VERSION: v13.14.1
   GITLAB_WORKHORSE_VERSION: v8.58.4
   GITLAB_CONTAINER_REGISTRY_VERSION: v2.12.0-gitlab
-  GITALY_SERVER_VERSION: v13.7.8
+  GITALY_SERVER_VERSION: v13.7.9
   GITLAB_PAGES_VERSION: v1.34.0
   GIT_VERSION: 2.29.0
   GO_VERSION: 1.14.5