chore(deps): bump puma in /demo in the regular-updates group

Bumps the regular-updates group in /demo with 1 update: [puma](https://github.com/puma/puma).


Updates `puma` from 6.5.0 to 6.6.0
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v6.5.0...v6.6.0)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: regular-updates
...

Signed-off-by: dependabot[bot] <support@github.com>

demo/Gemfile.lock

@@ -171,7 +171,7 @@ GEM
       method_source (~> 1.0)
     psych (5.1.2)
       stringio
-    puma (6.5.0)
+    puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (3.1.8)