[imsc] Add IMSC 1.3 Text designator HTML file (#638)

nigelmegitt has just created a new issue for https://github.com/w3c/imsc:

== Add IMSC 1.3 Text designator HTML file ==
None

Please view or discuss this issue at https://github.com/w3c/imsc/issues/638 using your GitHub account


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Received on Friday, 27 February 2026 16:20:44 UTC