(Content) Update help text for "Auto pair Markdown syntax" setting

[malecjan]

@WhiteNoise In Add an Obsidian command for ‘toggle strikethrough for selection' - #7 by malecjan I suggested concise version idicating more options by ellipses. Would that be acceptable?

@malecjan

I would just update description in settings from
“Pair symbols automatically for bold and italic.”
to
“Pair symbols automatically for bold, italic, ...”

Which would loosely indicate it supports more symbols. Precise range of autopaired markdown syntax can be specified in up to date documentation.