[ttml2] Add 2nd edition change log? (#1245)

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

== Add 2nd edition change log? ==
TTML2 has a log of differences v TTML1.  It might help the casual reader if the differences between TTML2 and TTML2 "(2nd Edition)" were also called out.


Please view or discuss this issue at https://github.com/w3c/ttml2/issues/1245 using your GitHub account


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Received on Monday, 4 April 2022 20:13:33 UTC