Bump protobuf from 5.27.0 to 5.27.1 in /hello-grpc-python

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 5.27.0 to 5.27.1.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v5.27.0...v5.27.1)

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

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

hello-grpc-python/requirements.txt

@@ -1,7 +1,7 @@
 # https://pypi.org/project/grpcio-tools/
 grpcio-tools==1.64.0
 # https://pypi.org/project/protobuf/
-protobuf==5.27.0
+protobuf==5.27.1
 # https://pypi.org/project/futures/
 # https://pypi.org/project/futures3/
 futures==3.0.5