Bump rexml from 3.2.6 to 3.2.8 (#79)

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

Gemfile.lock

@@ -226,7 +226,8 @@ GEM
     regexp_parser (2.8.2)
     reline (0.5.9)
       io-console (~> 0.5)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (4.1.3)
     rubocop (1.56.4)
       base64 (~> 0.1.1)
@@ -273,6 +274,7 @@ GEM
     stimulus-rails (1.2.2)
       railties (>= 6.0.0)
     stringio (3.1.1)
+    strscan (3.1.0)
     tailwindcss-rails (2.0.31-arm64-darwin)
       railties (>= 6.0.0)
     tailwindcss-rails (2.0.31-x86_64-linux)