Update git submodules

* Update helpcontent2 from branch 'master'
  - Uppercase function MUNIT
    
    Change-Id: Ife835065f29789785d5382081c2ebecb576e34dd
    Reviewed-on: https://gerrit.libreoffice.org/61407
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ e8e9ddc3

-Subproject commit 96b1b3768a3253d45b691a38cc0c02cfed5d20bd
+Subproject commit e8e9ddc33b7783cceb309c325cf9aea93ec1884d