Bump puma from 6.3.1 to 6.4.0

Bumps [puma](https://github.com/puma/puma) from 6.3.1 to 6.4.0.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](https://github.com/puma/puma/compare/v6.3.1...v6.4.0)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -21,7 +21,7 @@ gem 'acts_as_list'
 gem 'bcrypt', '~> 3.1.19'
 gem 'htmlentities'
 gem "kt-paperclip", "~> 7.2"
-gem 'puma', '~> 6.3'
+gem 'puma', '~> 6.4'
 gem 'rails_autolink'
 gem 'RedCloth'
 gem 'sanitize', '~> 6.1'

Gemfile.lock

@@ -195,7 +195,7 @@ GEM
       ast (~> 2.4.1)
       racc
     pg (1.5.4)
-    puma (6.3.1)
+    puma (6.4.0)
       nio4r (~> 2.0)
     racc (1.7.1)
     rack (2.2.8)
@@ -375,7 +375,7 @@ DEPENDENCIES
   mocha
   mysql2 (~> 0.5.5)
   pg (~> 1.5.4)
-  puma (~> 6.3)
+  puma (~> 6.4)
   rack-mini-profiler
   rails (~> 6.0.0)
   rails-controller-testing