chore: Revert disable renovate for protobuf dependencies (#3025)

Reverts #2666 now that
https://github.com/apache/beam/releases/tag/v2.57.0 is out

Author: zhumin8

renovate.json

@@ -155,8 +155,7 @@
         "^com.google.protobuf",
 		"^protocolbuffers/protobuf"
       ],
-      "groupName": "Protobuf dependencies",
-      "enabled": false
+      "groupName": "Protobuf dependencies"
     },
     {
       "matchPackagePatterns": [