revgizmo/zoomstudentengagement

AI Summary: The VTT format documentation in `inst/extdata/test_transcripts/README.md` is outdated and needs to be updated. It currently shows `<v Speaker Name>text` but should reflect the correct `Speaker Name: text` format, including comment numbers, as used by the `load_zoom_transcript()` function. The task is to update the README's example to match actual generated files and explain the comment number requirement for clarity.