fix: Gemfile & Gemfile.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-PUMA-8062124

Author: snyk-bot

Gemfile

@@ -10,7 +10,7 @@ ruby '3.1.4'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '7.1.3.4'
 # Use Puma as the app server
-gem 'puma', '6.4.2'
+gem 'puma', '6.4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>=5.0.5'
 # Use Uglifier as compressor for JavaScript assets

Gemfile.lock

@@ -169,7 +169,7 @@ GEM
     psych (5.1.2)
       stringio
     public_suffix (5.1.1)
-    puma (6.4.2)
+    puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.8.0)
     rack (3.1.3)
@@ -288,7 +288,7 @@ DEPENDENCIES
   contentstack (~> 0.8.0)
   jbuilder (= 2.11.5)
   listen (= 3.9.0)
-  puma (= 6.4.2)
+  puma (= 6.4.3)
   rails (= 7.1.3.4)
   sass-rails (>= 5.0.5)
   selenium-webdriver (= 4.8.6)
@@ -303,4 +303,4 @@ RUBY VERSION
    ruby 3.1.4p223
 
 BUNDLED WITH
-   2.5.6
+   2.3.26