add generated files to test trigger (#4832)

.yamato/protobuf-generation-test.yml

       pull_request.target match "release.+") AND
       NOT pull_request.draft AND
       (pull_request.changes.any match "protobuf-definitions/**" OR
+      pull_request.changes.any match "com.unity.ml-agents/Runtime/Grpc/CommunicatorObjects/**" OR
+      pull_request.changes.any match "ml-agents-envs/mlagents_envs/communicator_objects/**" OR
       pull_request.changes.any match ".yamato/protobuf-generation-test.yml") AND
       NOT pull_request.changes.all match "protobuf-definitions/**/*.md"
   artifacts: