Protobuf security bulletin

[Richard Belleville]

The protocol buffers project has published a security bulletin affecting protobuf for C++ and Python: https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-8gq9-2x98-w8hf

Please consider upgrading your protobuf version ASAP. The following gRPC versions have been tested with the patched protobuf versions and will work properly with them:

• grpc (C++) (1.49.1, 1.48.2, 1.47.2, 1.46.5)
• grpcio, grpcio-tools (Python) (1.49.1, 1.48.2, 1.47.2, 1.46.5)