build(deps): bump rexml from 3.2.6 to 3.3.0 in /docs (#1147)

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.6 to 3.3.0.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.2.6...v3.3.0)

---
updated-dependencies:
- dependency-name: rexml
  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

@@ -63,13 +63,15 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.6)
+    rexml (3.3.0)
+      strscan
     rouge (4.2.1)
     safe_yaml (1.0.5)
     sass-embedded (1.76.0-arm64-darwin)
       google-protobuf (>= 3.25, < 5.0)
     sass-embedded (1.76.0-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)