Update git submodules

* Update helpcontent2 from branch 'master'
  - Cleanups
    
    in /shared/00/
    
    Change-Id: I54fc724adac9d08ac6f705933c4b3fc0cf9ffa0b
    Reviewed-on: https://gerrit.libreoffice.org/57134
    Tested-by: Jenkins
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
    

helpcontent2 @ c823daa3

-Subproject commit 5c78f56bc417b0be078f84303ab4895c9e1f7daf
+Subproject commit c823daa3858c14f444927ab313c28fc2d4dc3d5e