Update dependency minitest to v6

Author: renovate[bot]

Gemfile

@@ -47,7 +47,7 @@ end
 group :test do
   gem 'capybara'
   gem 'climate_control'
-  gem 'minitest', '< 6' # required for Rails 7.2.3
+  gem 'minitest', '< 7' # required for Rails 7.2.3
   gem 'selenium-webdriver'
   gem 'simplecov', require: false
   gem 'simplecov-lcov', require: false

Gemfile.lock

@@ -236,7 +236,8 @@ GEM
     mercenary (0.4.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.9)
-    minitest (5.27.0)
+    minitest (6.0.1)
+      prism (~> 1.5)
     msgpack (1.8.0)
     multi_json (1.19.1)
     net-http (0.9.1)
@@ -467,7 +468,7 @@ DEPENDENCIES
   jwt
   listen
   lograge
-  minitest (< 6)
+  minitest (< 7)
   mitlibraries-theme!
   opensearch-ruby
   pg