Bump the grpcio group with 2 updates

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

Updates `grpcio` from 1.69.0 to 1.70.0
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.69.0...v1.70.0)

Updates `grpcio-tools` from 1.69.0 to 1.70.0
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.69.0...v1.70.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -11,8 +11,8 @@ requires = [
   # 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",
-  "grpcio-tools == 1.69.0",
-  "grpcio == 1.69.0",
+  "grpcio-tools == 1.70.0",
+  "grpcio == 1.70.0",
 
 ]
 build-backend = "setuptools.build_meta"