Updated core

Project: help  a6b63716e5f4921209336025f21cff41a103d9dc

Add screenshots for help in smath module

starmath module has 8 dialogs.
Generated by make screenshot in starmath/
--with-lang=ALL

Change-Id: I54f34e9aaab3062ec90799ce2ab0994c0393a2dd
Reviewed-on: https://gerrit.libreoffice.org/53921Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>

helpcontent2 @ a6b63716

-Subproject commit 5c889a294765c6d91999a561c7bdb6d59eaf9876
+Subproject commit a6b63716e5f4921209336025f21cff41a103d9dc