Bump grpc-tools from 1.32.0 to 1.35.0

Bumps [grpc-tools](https://github.com/google/grpc) from 1.32.0 to 1.35.0.
- [Release notes](https://github.com/google/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/src/ruby/CHANGELOG.md)
- [Commits](grpc/grpc@v1.32.0...v1.35.0)

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

Gemfile.lock

@@ -38,7 +38,7 @@ GEM
     grpc (1.32.0)
       google-protobuf (~> 3.13)
       googleapis-common-protos-types (~> 1.0)
-    grpc-tools (1.32.0)
+    grpc-tools (1.35.0)
     ice_nine (0.11.2)
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)