Fix missing syntax highlighting for perl
Fix missing syntax highlighting for perl

jtigger/exercism.io,IanDCarroll/exercism.io,k4rtik/exercism.io,RaptorRCX/exercism.io,Tonkpils/exercism.io,nathanbwright/exercism.io,tejasbubane/exercism.io,RaptorRCX/exercism.io,treiff/exercism.io,tejasbubane/exercism.io,IanDCarroll/exercism.io,Tonkpils/exercism.io,nathanbwright/exercism.io,treiff/exercism.io,mhelmetag/exercism.io,nathanbwright/exercism.io,Tonkpils/exercism.io,jtigger/exercism.io,RaptorRCX/exercism.io,mhelmetag/exercism.io,Tonkpils/exercism.io,treiff/exercism.io,jtigger/exercism.io,treiff/exercism.io,RaptorRCX/exercism.io,jtigger/exercism.io,mhelmetag/exercism.io,tejasbubane/exercism.io,k4rtik/exercism.io,nathanbwright/exercism.io,IanDCarroll/exercism.io,IanDCarroll/exercism.io,tejasbubane/exercism.io,k4rtik/exercism.io,mhelmetag/exercism.io