update sherman simulation command as per Felix comment
update sherman simulation command as per Felix comment

PeteHaitch/bwa-parclip,PeteHaitch/bwa-parclip,brentp/bwa-meth,PeteHaitch/bwa-parclip,dariober/bwa-meth,dariober/bwa-meth,brentp/bwa-meth,dariober/bwa-meth,brentp/bwa-meth