Fix code scanning alert no. 1127: Missing regular expression anchor

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

config/environments/development.rb

@@ -119,7 +119,7 @@
     config.hosts.push(*ENV["OPENPROJECT_DEV_EXTRA_HOSTS"].split(","))
   end
 
-  config.hosts.push /\w+\.openproject-dev\.com/
+  config.hosts.push /\A\w+\.openproject-dev\.com\z/
 end
 
 ActiveRecord::Base.logger = ActiveSupport::Logger.new($stdout) unless String(ENV.fetch("SILENCE_SQL_LOGS", nil)).to_bool