Bump protobuf from 5.29.3 to 6.30.2

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 5.29.3 to 6.30.2.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v5.29.3...v6.30.2)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-version: 6.30.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -10,7 +10,7 @@ requires = [
   # sure the code is generated using the minimum supported versions, as older
   # versions can't work with code that was generated with newer versions.
   # https://protobuf.dev/support/cross-version-runtime-guarantee/#backwards
-  "protobuf == 5.29.3",
+  "protobuf == 6.30.2",
   "grpcio-tools == 1.70.0",
   "grpcio == 1.70.0",
 ]