merge revision(s) ae6bd3b4, 96645819, 96645819: [Backport #20951]

	[DOC] Tweak "Timezone Objects"

	- Make method descriptions plain pragraphs in each method.
	- Make "Argument" and "Returns" note-lists.

	[Bug #20951] [DOC] About UTC offset calculation after `utc_to_local`

	[Bug #20951] [DOC] About UTC offset calculation after `utc_to_local`