Bump puma from 5.6.4 to 5.6.7

Bumps [puma](https://github.com/puma/puma) from 5.6.4 to 5.6.7.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.6.4...v5.6.7)

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

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

Gemfile.lock

@@ -22,12 +22,12 @@ GEM
     multi_json (1.15.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.8)
+    nio4r (2.5.9)
     nokogiri (1.13.6-x86_64-darwin)
       racc (~> 1.4)
     nokogiri (1.13.6-x86_64-linux)
       racc (~> 1.4)
-    puma (5.6.4)
+    puma (5.6.7)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3.1)