chore(deps-dev): bump grpcio-tools in the development-dependencies group

Bumps the development-dependencies group with 1 update: [grpcio-tools](https://github.com/grpc/grpc).


Updates `grpcio-tools` from 1.67.1 to 1.68.0
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.67.1...v1.68.0)

---
updated-dependencies:
- dependency-name: grpcio-tools
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
...

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

Author: dependabot[bot]

poetry.lock

@@ -29,7 +29,7 @@ grpcio = "^1.67"
 betterproto = { version = "^2.0.0b7", allow-prereleases = true }
 
 [tool.poetry.dev-dependencies]
-grpcio-tools = "^1.67"
+grpcio-tools = "^1.68"
 black = "^24.10"
 pre-commit = "^4.0"
 pytest = "^8.3"