wina11y: Update comment now that IAccessible2 PR was merged

IAccessible2 PR [1] was merged now as upstream commit [2]

commit 2b8c2c79417bad4b464761a142fab45ffde8bfa8
Author: Michael Weghorn <m.weghorn@posteo.de>
Date:   Thu Aug 29 07:55:56 2024 +0200

Add an "id" object attribute. (#31)

, so is part of the official IAccessible2 object
attribute specification now.

[1] https://github.com/LinuxA11y/IAccessible2/pull/31
[2] https://github.com/LinuxA11y/IAccessible2/commit/2b8c2c79417bad4b464761a142fab45ffde8bfa8

Change-Id: Ia613a673b832d35bcc6e3801325dc9f55b393a2c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/172585
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>