Update git submodules

* Update helpcontent2 from branch 'libreoffice-6-2'
  - This paragraph just repeats what the paragraph immediately above says
    
    Change-Id: Iccc9fb41811a4914fdda0f346f9bd32049932448
    (cherry picked from commit 36a01a03a960bc2e152cb8ecd21844f91cfa46bd)
    Reviewed-on: https://gerrit.libreoffice.org/68517
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ e5e19bf0

-Subproject commit 06e3b4dcb878f735bca347d3a19ad011e45330f0
+Subproject commit e5e19bf05d9f59e61c19b1d40aacedc643f6d6f1