[webrtc-pc] Pull Request: Modify test needs for chapter 6

alvestrand has just submitted a new pull request for https://github.com/w3c/webrtc-pc:

== Modify test needs for chapter 6 ==
Fixes #2463

Note: there's a "no-test-needed" section that still turns pink with grey text rather than turning white. I'm not sure what that means.


See https://github.com/w3c/webrtc-pc/pull/2493