Update renovate config (#761)

Author: lucacome

renovate.json

@@ -1,17 +1,6 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:recommended",
-    "docker:enableMajor"
-  ],
-  "automerge": true,
-  "rebaseWhen": "auto",
-  "postUpdateOptions": [
-    "gomodTidy",
-    "gomodUpdateImportPaths"
-  ],
-  "labels": [
-    "dependencies"
-  ],
-  "prConcurrentLimit": 0
+    "github>nginxinc/k8s-common"
+  ]
 }