Bump grpc-tools from 1.59.2 to 1.60.0

Bumps [grpc-tools](https://github.com/google/grpc) from 1.59.2 to 1.60.0.
- [Release notes](https://github.com/google/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/src/ruby/CHANGELOG.md)
- [Commits](grpc/grpc@v1.59.2...v1.60.0)

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

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

Gemfile.lock

@@ -28,7 +28,7 @@ GEM
     grpc (1.59.2-x86_64-linux)
       google-protobuf (~> 3.24)
       googleapis-common-protos-types (~> 1.0)
-    grpc-tools (1.59.2)
+    grpc-tools (1.60.0)
     method_source (1.0.0)
     os (1.1.4)
     parser (3.2.2.4)