Bump google-protobuf in /docs in the bundler group across 1 directory

Bumps the bundler group with 1 update in the /docs directory: [google-protobuf](https://github.com/protocolbuffers/protobuf).


Updates `google-protobuf` from 3.23.4 to 3.25.5
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.23.4...v3.25.5)

---
updated-dependencies:
- dependency-name: google-protobuf
  dependency-type: indirect
  dependency-group: bundler
...

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

docs/Gemfile.lock

@@ -11,7 +11,7 @@ GEM
     eventmachine (1.2.7)
     ffi (1.15.5)
     forwardable-extended (2.6.0)
-    google-protobuf (3.23.4-x86_64-linux)
+    google-protobuf (3.25.5-x86_64-linux)
     http_parser.rb (0.8.0)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)