Update git submodules

* Update helpcontent2 from branch 'master'
  - Fix typo
    
    Change-Id: If125b22f4d77670b82a8951ad72e07d3d7e82364
    Reviewed-on: https://gerrit.libreoffice.org/65120
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 193f7946

-Subproject commit eea4d307ecbd8500bc429be7b0c05cf4097a5686
+Subproject commit 193f79464c5ab0c4b183bd1d439f1bceedfdca8c