Update git submodules

* Update helpcontent2 from branch 'master'
  - Python: Remove wrong statement on modules.
    
    Change-Id: Ie8c8e9617807a27b2a152abaff0dbcafc03e9c2a
    Reviewed-on: https://gerrit.libreoffice.org/65255
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ c87f4792

-Subproject commit 720c5c4aa52b4f7319a31a8cc55d330bf82fb017
+Subproject commit c87f47920ff8524fb73ea39f5cafe42d1dc3c193