Updated core

Project: help  28138ff018a1ee48dc659b6d0ef0073b0a00a14e

tdf#115599 Add signature line help page

Refactor digital signatures help pages.

Fix some typos.
And more typos

Change-Id: I2db4e3a73fcdd716d32e6c271205d0ae12c28975
Reviewed-on: https://gerrit.libreoffice.org/54502Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>

helpcontent2 @ 28138ff0

-Subproject commit e819fccbbc0fd5430f5d99e575f648a89a97007e
+Subproject commit 28138ff018a1ee48dc659b6d0ef0073b0a00a14e