Bump puma from 5.6.7 to 5.6.8

Bumps [puma](https://github.com/puma/puma) from 5.6.7 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@v5.6.7...v5.6.8)

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

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

Gemfile

@@ -6,7 +6,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby File.read('.ruby-version').strip
 
 gem 'archive-zip', '~> 0.12.0'
-gem 'puma', '~> 5.5'
+gem 'puma', '~> 5.6'
 gem 'sequel', '~> 5.52'
 gem 'sinatra', '~> 2.1'
 gem 'sinatra-contrib', '~> 2.1'

Gemfile.lock

@@ -24,7 +24,7 @@ GEM
     pry (0.14.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    puma (5.6.7)
+    puma (5.6.8)
       nio4r (~> 2.0)
     racc (1.7.3)
     rack (2.2.8)
@@ -78,7 +78,7 @@ DEPENDENCIES
   archive-zip (~> 0.12.0)
   bundler-audit (~> 0.9.1)
   pry (~> 0.14.1)
-  puma (~> 5.5)
+  puma (~> 5.6)
   rubocop (~> 1.25)
   rubocop-sequel (~> 0.3.3)
   sequel (~> 5.52)