Help/About: Move "Learn more: Auto-updates documentation" link about...

Help/About: Move "Learn more: Auto-updates documentation" link about "Support", for consistency with other screens.

Follow-up to [48062].

See #50215.
Built from https://develop.svn.wordpress.org/trunk@48095


git-svn-id: https://core.svn.wordpress.org/trunk@47864 1a063a9b-81f0-0310-95a4-ce76da25c4cd