use new ATTCK ref

Author: h00die

modules/exploits/linux/persistence/bash_profile.rb

@@ -52,7 +52,7 @@ def initialize(info = {})
         ],
         'DefaultTarget' => 0,
         'References' => [
-          ['URL', 'https://attack.mitre.org/techniques/T1546/004/']
+          ['ATT&CK', Mitre::Attack::Technique::T1546_004_UNIX_SHELL_CONFIGURATION_MODIFICATION]
         ],
         'Notes' => {
           'Reliability' => [ REPEATABLE_SESSION, EVENT_DEPENDENT ],