Update grpc-netty, grpc-protobuf, grpc-stub to 1.47.1 (#1411)
Update grpc-netty, grpc-protobuf, grpc-stub to 1.47.1 (#1411)

Co-authored-by: mergify[bot] <b09a6ee808b67e98a221404e7aaa52e0398a4954@users.noreply.github.com>
scalapb/ScalaPB,scalapb/ScalaPB,scalapb/ScalaPB,scalapb/ScalaPB