Update registry_persistence.rb

Author: sammbertram

modules/exploits/windows/local/registry_persistence.rb

@@ -53,7 +53,7 @@ def initialize(info = {})
         [false, 'The name to use for the \'Run\' key. (Default: random)' ]),
       OptBool.new('CREATE_RC',
         [false, 'Create a resource file for cleanup', true]),
-      OptString.new('SLEEP_TIME',
+      OptInt.new('SLEEP_TIME',
         [false, 'Amount of time to sleep (in seconds) before executing payload. (Default: 0)', 0]),
     ], self.class)
   end