build(deps): bump puma from 6.0.0 to 6.3.1 in /rails

Bumps [puma](https://github.com/puma/puma) from 6.0.0 to 6.3.1.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v6.0.0...v6.3.1)

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

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

rails/Gemfile.lock

@@ -321,7 +321,7 @@ GEM
     net-http-digest_auth (1.4.1)
     net-http-persistent (4.0.1)
       connection_pool (~> 2.2)
-    nio4r (2.5.7)
+    nio4r (2.5.9)
     nokogiri (1.11.7)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -368,7 +368,7 @@ GEM
       byebug (~> 10.0)
       pry (~> 0.10)
     public_suffix (4.0.6)
-    puma (6.0.0)
+    puma (6.3.1)
       nio4r (~> 2.0)
     pundit (1.1.0)
       activesupport (>= 3.0.0)