Bump protobuf from 5.28.3 to 5.29.0

Bumps [protobuf](https://github.com/protocolbuffers/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)

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

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

requirements.txt

@@ -68,7 +68,7 @@ paramiko==3.5.0
     # via supa (setup.cfg)
 portend==3.2.0
     # via cherrypy
-protobuf==5.28.3
+protobuf==5.29.0
     # via
     #   grpcio-tools
     #   mypy-protobuf