docs: Document group
docs: Document group

Fixes https://github.com/gohugoio/hugoDocs/issues/597

anthonyfok/hugo,gohugoio/hugo,fedelibre/hugo,fedelibre/hugo,fedelibre/hugo,mdhender/hugo,gohugoio/hugo,anthonyfok/hugo,mdhender/hugo,mdhender/hugo,mdhender/hugo,anthonyfok/hugo,fedelibre/hugo,gohugoio/hugo