5to6-perlfunc: Fix typo
5to6-perlfunc: Fix typo

I apparently managed to hit the transpose key a few times accidentally
right after spell-checking...

MasterDuke17/doc,gfldex/doc,jonathanstowe/doc,perl6/doc,MasterDuke17/doc,jonathanstowe/doc,antquinonez/doc,stmuk/doc,perl6/doc,MasterDuke17/doc,stmuk/doc,gfldex/doc,tbrowder/doc,jonathanstowe/doc,dmaestro/doc,tbrowder/doc,jonathanstowe/doc,dmaestro/doc,stmuk/doc,gfldex/doc,gfldex/doc,antquinonez/doc,perl6/doc,jonathanstowe/doc,dmaestro/doc,MasterDuke17/doc,antquinonez/doc,perl6/doc,antquinonez/doc,stmuk/doc,perl6/doc,dmaestro/doc,antquinonez/doc,tbrowder/doc,tbrowder/doc,gfldex/doc,stmuk/doc,dmaestro/doc