Use single quotes

Author: jvazquez-r7

modules/auxiliary/gather/apple_safari_ftp_url_cookie_theft.rb

@@ -143,7 +143,7 @@ def on_client_command_retr(c, arg)
       return
     end
 
-    print_status("Connection for file transfer accepted")
+    print_status('Connection for file transfer accepted')
     c.put("150 Connection accepted\r\n")
 
     # Send out payload