Updated core

Project: help  644cf06e7b304f992c4f5291249b3721d9bfc7f6

Fix ahelps and bookmark in the Events page

'Customize - Events' and 'Sheet - Sheet Events'
uses this page, fix old style ahelps and add a bookmark
to the latter.

Change-Id: Ib54a3bd6d6f419cd35e788987967d1381a7430eb
Reviewed-on: https://gerrit.libreoffice.org/32568Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>

helpcontent2 @ 644cf06e

-Subproject commit cefd88394fd05463539ad228ca7edf6c672e7c9b
+Subproject commit 644cf06e7b304f992c4f5291249b3721d9bfc7f6