Added canonical url to refererInfo (#1027)
Added canonical url to refererInfo (#1027)

* canonical url

* Update bidder-adaptor.md

sonobi/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io,sonobi/prebid.github.io,prebid/prebid.github.io,sonobi/prebid.github.io