renovate: add compose.yml.j2 file support to config

renovate.json

@@ -2,5 +2,10 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:recommended"
+  ],
+  "docker-compose": {
+    "fileMatch": [
+      "(^|/)(?:docker-)?compose[^/]*\\.ya?ml(\\.j2)?$"
     ]
   }
+}