Update git submodules

* Update helpcontent2 from branch 'master'
  - Add dimensions to svg icons
    
    + refactor some headings
    
    Change-Id: Ic194be7d99685d3272393088973367bbbcd3246c
    Reviewed-on: https://gerrit.libreoffice.org/84960
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 16ac2e5..96c9eaf 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 16ac2e562235fb6c908ada4ce1af4cd67c473df3
Subproject commit 96c9eaf34676be060349e683f271995abc7779eb