Bump grpcio-tools from 1.66.1 to 1.66.2 in /hello-grpc-python

Bumps [grpcio-tools](https://github.com/grpc/grpc) from 1.66.1 to 1.66.2.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.66.1...v1.66.2)

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

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

hello-grpc-python/requirements.txt

@@ -1,5 +1,5 @@
 # https://pypi.org/project/grpcio-tools/
-grpcio-tools==1.66.1
+grpcio-tools==1.66.2
 # https://pypi.org/project/protobuf/
 protobuf==5.28.2
 # https://pypi.org/project/futures/