Bump puma from 4.3.12 to 5.6.8

Bumps [puma](https://github.com/puma/puma) from 4.3.12 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@v4.3.12...v5.6.8)

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

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

Gemfile.lock

@@ -207,7 +207,7 @@ GEM
       net-ssh (>= 2.6.5, < 6.0.0)
     net-ssh (5.2.0)
     newrelic_rpm (6.7.0.359)
-    nio4r (2.5.8)
+    nio4r (2.7.0)
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
     orm_adapter (0.5.0)
@@ -251,7 +251,7 @@ GEM
     pry-rails (0.3.4)
       pry (>= 0.9.10)
     public_suffix (4.0.7)
-    puma (4.3.12)
+    puma (5.6.8)
       nio4r (~> 2.0)
     pundit (1.1.0)
       activesupport (>= 3.0.0)