Bump the bundler group across 1 directory with 2 updates

Bumps the bundler group with 2 updates in the / directory: [rack](https://github.com/rack/rack) and [rexml](https://github.com/ruby/rexml).


Updates `rack` from 2.2.6.3 to 2.2.9
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.6.3...v2.2.9)

Updates `rexml` from 3.2.5 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@v3.2.5...v3.2.8)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
  dependency-group: bundler
- dependency-name: rexml
  dependency-type: indirect
  dependency-group: bundler
...

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

Gemfile.lock

@@ -112,7 +112,7 @@ GEM
       method_source (~> 1.0)
     public_suffix (5.0.1)
     racc (1.6.2)
-    rack (2.2.6.3)
+    rack (2.2.9)
     rack-livereload (0.3.17)
       rack
     rack-protection (2.2.4)
@@ -121,7 +121,8 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -150,6 +151,7 @@ GEM
       rack-protection (= 2.2.4)
       tilt (~> 2.0)
     sinatra-cross_origin (0.3.2)
+    strscan (3.1.0)
     sys-uname (1.2.2)
       ffi (~> 1.1)
     thin (1.8.1)