Update git submodules

* Update helpcontent2 from branch 'master'
  - Reduce L10N workload for repetitive strings
    
    Change 'Syntax' and 'Examples' heading into an embedded string
    translated only once.
    
    Change-Id: Iac2eef8fedbaa4461aa2f941af7f065a3b16fb2d
    Reviewed-on: https://gerrit.libreoffice.org/61143
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ b358fb9b

-Subproject commit c5ee45213fccf09f14c6fe13fd25cae0c8a71b43
+Subproject commit b358fb9b95915743d8666b238acb8e117c8751ce