Update git submodules

* Update helpcontent2 from branch 'master'
  - tdf#117890 Remove unhelpful screenshots (1/2)
    
    Change-Id: I8a96220ae688f78fe43d66ab205323f3d4605140
    Reviewed-on: https://gerrit.libreoffice.org/68392
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ c74a4653

-Subproject commit 1c8dbb18e1ff9f3c49f0112a9f687c044fbd31d2
+Subproject commit c74a4653f50aedfd99ee83a1a841ad5b7886b9be