chore(deps): update dependency rack-contrib to v2.5.0

Author: mend-for-github-com[bot]

Gemfile

@@ -5,7 +5,7 @@ gem 'faye-websocket', '0.11.0'
 gem 'vonage', '~> 7.28'
 gem 'sinatra', '2.1.0'
 gem 'sinatra-contrib', '2.1.0'
-gem 'rack-contrib', '2.3.0'
+gem 'rack-contrib', '2.5.0'
 gem 'thin', '1.8.0'
 gem 'rubocop', require: false
 gem "byebug", "~> 11.0"