Bump puma from 5.6.2 to 5.6.4

Bumps [puma](https://github.com/puma/puma) from 5.6.2 to 5.6.4.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.6.2...v5.6.4)

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

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

Gemfile

@@ -10,7 +10,7 @@ gem "rails", "~> 7.0.2", ">= 7.0.2.2"
 gem "mysql2", "~> 0.5"
 
 # Use the Puma web server [https://github.com/puma/puma]
-gem "puma", "~> 5.0"
+gem "puma", "~> 5.6"
 
 # Build JSON APIs with ease [https://github.com/rails/jbuilder]
 # gem "jbuilder"

Gemfile.lock

@@ -138,7 +138,7 @@ GEM
       middleware
       thor
       thread_safe
-    puma (5.6.2)
+    puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)
@@ -201,7 +201,7 @@ DEPENDENCIES
   gtfs
   gtfs-realtime-bindings
   mysql2 (~> 0.5)
-  puma (~> 5.0)
+  puma (~> 5.6)
   rack-cors
   rails (~> 7.0.2, >= 7.0.2.2)
   tzinfo-data