Bump puma from 5.4.0 to 5.6.9

Bumps [puma](https://github.com/puma/puma) from 5.4.0 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@v5.4.0...v5.6.9)

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

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

Gemfile.lock

@@ -177,7 +177,7 @@ GEM
     multi_test (0.1.2)
     multipart-post (2.0.0)
     newrelic_rpm (5.0.0.342)
-    nio4r (2.5.8)
+    nio4r (2.7.3)
     nokogiri (1.15.5)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
@@ -193,7 +193,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.6)
-    puma (5.4.0)
+    puma (5.6.9)
       nio4r (~> 2.0)
     puma-heroku (2.0.0)
       puma (>= 5.0, < 6.0)