Bump puma from 5.6.5 to 5.6.8 in /rails_application

Bumps [puma](https://github.com/puma/puma) from 5.6.5 to 5.6.8.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.6.5...v5.6.8)

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

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

rails_application/Gemfile.lock

@@ -182,7 +182,7 @@ GEM
       timeout
     net-smtp (0.3.3)
       net-protocol
-    nio4r (2.5.8)
+    nio4r (2.7.3)
     nokogiri (1.14.1)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
@@ -196,7 +196,7 @@ GEM
       ast (~> 2.4.1)
       racc
     pg (1.4.5)
-    puma (5.6.5)
+    puma (5.6.8)
       nio4r (~> 2.0)
     racc (1.6.2)
     rack (2.2.8)