Update Perl lab README
Update Perl lab README

lionell/laboratories,lionell/labs,lionell/labs,lionell/labs,lionell/labs,lionell/university-labs,lionell/labs,lionell/laboratories,lionell/labs,lionell/labs,lionell/university-labs,lionell/labs,lionell/university-labs,lionell/labs,lionell/laboratories,lionell/university-labs,lionell/labs,lionell/labs