Bump rexml from 3.2.6 to 3.2.8 in /example (#78)

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.6 to 3.2.8.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.2.6...v3.2.8)

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

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

example/Gemfile.lock

@@ -47,6 +47,7 @@ GEM
     localhost (1.1.10)
     mayu-css (0.1.2-arm64-darwin)
     mayu-css (0.1.2-x86_64-darwin)
+    mayu-css (0.1.2-x86_64-linux)
     mayu-live (0.0.6)
       async (~> 2.8.0)
       async-container (~> 0.16.12)
@@ -102,13 +103,15 @@ GEM
       ffi (~> 1.0)
     rbnacl (7.1.1)
       ffi
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rmagick (5.3.0)
       pkg-config (~> 1.4)
     rouge (4.0.1)
     sorbet-runtime (0.5.11188)
     source_map (3.0.1)
       json
+    strscan (3.1.0)
     syntax_tree (5.3.0)
       prettier_print (>= 1.2.0)
     syntax_tree-haml (3.0.0)
@@ -133,6 +136,7 @@ PLATFORMS
   arm64-darwin-22
   arm64-darwin-23
   x86_64-darwin-20
+  x86_64-linux
 
 DEPENDENCIES
   fuzzy_match