fix typo

bin/ubuntu_disconnect_bubble

@@ -58,7 +58,7 @@ if [[ ${DO_DELETE} -eq 0 ]] ; then
   echo "
 ===================================================================
 ======= Linux device successfully disconnected from Bubble! =======
-=======================================================-===========
+===================================================================
 Public IP   : $(curl -s http://checkip.amazonaws.com/)
 "
   exit 0