docs: Fix example for Param method
docs: Fix example for Param method

Fixes #2070

vbatoufflet/hugo,fedelibre/hugo,mdhender/hugo,mdhender/hugo,gohugoio/hugo,melo/hugo,tubo028/hugo,anthonyfok/hugo,ffrizzo/hugo,abourget/hugo,anthonyfok/hugo,tischda/hugo,ffrizzo/hugo,digitalcraftsman/hugo,mdhender/hugo,jygastaud/hugo,bogem/hugo,tubo028/hugo,tischda/hugo,MarkDBlackwell/hugo,Zenithar/hugo,mitchchn/hugo,fedelibre/hugo,Zenithar/hugo,gohugoio/hugo,mayah/hugo,anthonyfok/hugo,abourget/hugo,fedelibre/hugo,vbatoufflet/hugo,MarkDBlackwell/hugo,gohugoio/hugo,mayah/hugo,melo/hugo,bogem/hugo,jygastaud/hugo,mitchchn/hugo,mdhender/hugo,digitalcraftsman/hugo,fedelibre/hugo