Upgrade Rails to 5.2.4.4 (#34062).

git-svn-id: http://svn.redmine.org/redmine/trunk@20109 e93f8b46-1217-0410-a6f0-8f06a7374b81

Author: jplang

Gemfile

@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 ruby '>= 2.3.0', '< 2.7.0'
 gem 'bundler', '>= 1.12.0'
 
-gem 'rails', '5.2.4.2'
+gem 'rails', '5.2.4.4'
 gem 'sprockets', '~> 3.7.2' if RUBY_VERSION < '2.5'
 gem 'rouge', '~> 3.23.0'
 gem 'request_store', '~> 1.5.0'