Update doc file for TheMediaGrid Bid Adapter (#2040)
Update doc file for TheMediaGrid Bid Adapter (#2040)

* Added doc file for Grid Bid Adapter

* update doc for TheMediaGrid Bid Adapter

* Added video support in Grid doc file

* removing unnecessary front matter

* Update doc file for TheMediaGrid Bid Adapter

* Added doc file for TheMediaGridNM Bid Adapter

* Update doc file for TheMediaGrid Bid Adapter

Co-authored-by: bretg <9df09da23577b88db5b6b8911d0635d4f870e78e@gmail.com>
prebid/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io