chore(deps-dev): bump grpc-tools in /http2/ruby-grpc

Bumps [grpc-tools](https://github.com/google/grpc) from 1.68.1 to 1.69.0.
- [Release notes](https://github.com/google/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/src/ruby/CHANGELOG.md)
- [Commits](grpc/grpc@v1.68.1...v1.69.0)

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

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

http2/ruby-grpc/Gemfile.lock

@@ -10,7 +10,7 @@ GEM
     grpc (1.69.0)
       google-protobuf (>= 3.25, < 5.0)
       googleapis-common-protos-types (~> 1.0)
-    grpc-tools (1.68.1)
+    grpc-tools (1.69.0)
     rake (13.2.1)
 
 PLATFORMS