chore(deps): bump the production-dependencies group with 2 updates

Bumps the production-dependencies group with 2 updates: [protobuf](https://github.com/protocolbuffers/protobuf) and [grpcio](https://github.com/grpc/grpc).


Updates `protobuf` from 5.28.3 to 5.29.0
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v5.28.3...v5.29.0)

Updates `grpcio` from 1.68.0 to 1.68.1
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.68.0...v1.68.1)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
- dependency-name: grpcio
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]