The Start Here document says:
By the way, you can feel free to edit these help docs, but when you click Settings => Help => Read Help again, they will be overwritten. So, don’t put anything in them you want to keep.
However, when I click the Settings button I don’t see a Help section. The closest thing I see is “Help” on the side and Settings => About => Obsidian help [Open], neither of which seems to regenerate the help text. How do I regenerate the help text after modifying it?