docs: Document the GDPR Privacy Config
docs: Document the GDPR Privacy Config

See #4751

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