s/print_warning/print_error.

Author: forzoni

modules/exploits/linux/local/docker_daemon_privilege_escalation.rb

@@ -36,7 +36,7 @@ def initialize(info={})
 
   def check
     if cmd_exec("sh -c 'docker ps; echo $?'").strip =~ /1$/
-      print_warning("Failed to access Docker daemon.")
+      print_error("Failed to access Docker daemon.")
       Exploit::CheckCode::Safe
     else
       Exploit::CheckCode::Vulnerable