doc: move the index func reference to where it's used
doc: move the index func reference to where it's used

ffrizzo/hugo,tischda/hugo,gohugoio/hugo,abourget/hugo,vbatoufflet/hugo,ryanclarke/hugo,badoet/hugo,soundrussian/hugo,ifraixedes/hugo,mayah/hugo,bogem/hugo,gohugoio/hugo,kujohn/hugo,abourget/hugo,tjyang/hugo,mdhender/hugo,halostatue/hugo,kujohn/hugo,bogem/hugo,mayah/hugo,bramp/hugo,mdhender/hugo,tatsushid/hugo,MarkDBlackwell/hugo,mitchchn/hugo,anthonyfok/hugo,mitchchn/hugo,melo/hugo,ifraixedes/hugo,digitalcraftsman/hugo,sprig/hugo,tubo028/hugo,mdhender/hugo,tjyang/hugo,bramp/hugo,badoet/hugo,mdhender/hugo,sprig/hugo,derekperkins/hugo,fedelibre/hugo,derekperkins/hugo,Zenithar/hugo,tatsushid/hugo,tischda/hugo,coderzh/hugo,fhergomez/hugo,soundrussian/hugo,gohugoio/hugo,anthonyfok/hugo,fedelibre/hugo,tubo028/hugo,jygastaud/hugo,MarkDBlackwell/hugo,ryanclarke/hugo,Zenithar/hugo,fedelibre/hugo,coderzh/hugo,melo/hugo,fhergomez/hugo,digitalcraftsman/hugo,jygastaud/hugo,anthonyfok/hugo,fedelibre/hugo,halostatue/hugo,vbatoufflet/hugo,ffrizzo/hugo