Merge pull request #980 from ChristianLempa/renovate/docker.io-gitlab-gitlab-ce-18.x

chore(deps): update docker.io/gitlab/gitlab-ce docker tag to v18

docker-compose/gitlab/compose.yaml

@@ -1,7 +1,7 @@
 ---
 services:
   gitlab:
-    image: docker.io/gitlab/gitlab-ce:17.11.2-ce.0
+    image: docker.io/gitlab/gitlab-ce:18.0.0-ce.0
     container_name: gitlab
     shm_size: '256m'
     environment: {}