Bump google-protobuf from 4.26.1 to 4.27.5 in /docs (#828)

Bumps [google-protobuf](https://github.com/protocolbuffers/protobuf) from 4.26.1 to 4.27.5.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](https://github.com/protocolbuffers/protobuf/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/Gemfile.lock

@@ -3,6 +3,7 @@ GEM
   specs:
     addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
+    bigdecimal (3.1.8)
     colorator (1.1.0)
     concurrent-ruby (1.2.3)
     em-websocket (0.5.3)
@@ -11,9 +12,11 @@ GEM
     eventmachine (1.2.7)
     ffi (1.16.3)
     forwardable-extended (2.6.0)
-    google-protobuf (4.26.1-arm64-darwin)
+    google-protobuf (4.27.5-arm64-darwin)
+      bigdecimal
       rake (>= 13)
-    google-protobuf (4.26.1-x86_64-linux)
+    google-protobuf (4.27.5-x86_64-linux)
+      bigdecimal
       rake (>= 13)
     http_parser.rb (0.8.0)
     i18n (1.14.5)