Add github actions update with PR labelling and automerge

Author: sjagoe

renovate.json

@@ -113,5 +113,13 @@
         "renovate-deps"
       ]
     }
-  ]
+  ],
+  "github-actions": {
+    "enabled": true,
+    "labels": [
+      "no release",
+      "renovate-deps"
+    ],
+    "automerge": true
+  }
 }