Bump rexml from 3.2.8 to 3.3.3 in /docs

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.8 to 3.3.3.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.2.8...v3.3.3)

---
updated-dependencies:
- dependency-name: rexml
  dependency-type: indirect
...

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

docs/Gemfile.lock

@@ -11,8 +11,6 @@ GEM
     eventmachine (1.2.7)
     ffi (1.16.3)
     forwardable-extended (2.6.0)
-    google-protobuf (4.26.1)
-      rake (>= 13)
     google-protobuf (4.26.1-arm64-darwin)
       rake (>= 13)
     google-protobuf (4.26.1-x86_64-linux)
@@ -65,16 +63,15 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.8)
+    rexml (3.3.3)
+      strscan
     rouge (4.2.1)
     safe_yaml (1.0.5)
-    sass-embedded (1.75.0)
-      google-protobuf (>= 3.25, < 5.0)
-      rake (>= 13.0.0)
     sass-embedded (1.75.0-arm64-darwin)
       google-protobuf (>= 3.25, < 5.0)
     sass-embedded (1.75.0-x86_64-linux-gnu)
       google-protobuf (>= 3.25, < 5.0)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.5.0)