Bump puma from 5.6.7 to 5.6.9

Bumps [puma](https://github.com/puma/puma) from 5.6.7 to 5.6.9.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.6.7...v5.6.9)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
...

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

Gemfile.lock

@@ -131,7 +131,7 @@ GEM
     prmd (0.14.0)
       erubis (~> 2.7)
       json_schema (~> 0.3, >= 0.3.1)
-    puma (5.6.7)
+    puma (5.6.9)
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (2.2.9)