Update git submodules

* Update helpcontent2 from branch 'master'
  - Refactor RegExp Help page with improved contents
    
    1) Mute some l10n strings
    
    Change-Id: Ia7a2c1898491c0f0352c9c8df519bba057b3bab6
    Reviewed-on: https://gerrit.libreoffice.org/73408
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 41a83520

-Subproject commit 9a0f4fb18ab7832dbafb4b789279411f5aa8cecd
+Subproject commit 41a83520a0f8a1a84619324291d3b1c1e2a2ee15