Advertise which flavour of markdown Nextcloud Notes uses

Is your feature request related to a problem? Please describe.
Could you please advertise which flavour of markdown you use? It would make migration from other solutions (such as Google Keep via Takeout) much easier combined with pandoc.

Describe the solution you'd like
pandoc supports several version of markdown:

• gfm (GitHub-Flavored Markdown), or the deprecated and less accurate markdown_github; use * markdown_github only if you need extensions not supported in gfm.
• markdown (Pandoc’s Markdown)
• markdown_mmd (MultiMarkdown)
• markdown_phpextra (PHP Markdown Extra)
• markdown_strict (original unextended Markdown)

To convert without problems we need to know the flavour!

Describe alternatives you've considered
sed

Additional context
for i in *html; do pandoc -f html -t someMarkdownFlavour "$i" > "$i.md"; done

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Start by identifying the Markdown parser or conversion configuration used by Nextcloud Notes, then compare its behavior with the Pandoc flavors listed in the issue. Document the exact flavor Notes uses in a user-facing location. Done means users can determine the correct Pandoc input flavor for migration.