[ttml2] Update changes file to add CR2 to CR3 differences.

skynavga has just created a new issue for https://github.com/w3c/ttml2:

== Update changes file to add CR2 to CR3 differences. ==


Please view or discuss this issue at https://github.com/w3c/ttml2/issues/931 using your GitHub account

Received on Tuesday, 24 July 2018 22:14:14 UTC