Update git submodules

* Update helpcontent2 from branch 'master'
  - - Partial refactoring using API calls
    - New bookmarks
    - Link from Basic Adv libraries to Platform page
    
    Caution: Please fix GlobalScope miss in </bascode> parser in the first place!
    
    Change-Id: Ifeaa98d5491b659a1dddbdbe3dddc417779374cf
    Reviewed-on: https://gerrit.libreoffice.org/72583
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 4f954243

-Subproject commit 9e082dd83b0203f1035f9fc4e95380034b68ae8e
+Subproject commit 4f954243e76c64fb09489cb5f501e395bf37e6ca