Update Edge's Rendering Engine on CONTRIBUTING.md (#32008)
Update Edge's Rendering Engine on CONTRIBUTING.md (#32008)

* Update Edge's Rendering Engine on CONTRIBUTING.md

Also updated the URL to prevent a HTTP redirect.

* Add 'Go to "Help > Send Feedback" from the browser' note

Co-authored-by: XhmikosR <b60f67e10123951b393d9ba15dcf79efc14744bb@gmail.com>
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