Update git submodules

* Update helpcontent2 from branch 'master'
  - Improper Python code requiring update
    
    Change-Id: Ia59f0e5d67718771152cca49704173701bf1f0f8
    Reviewed-on: https://gerrit.libreoffice.org/66957
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 9d3ac186

-Subproject commit 09fd6818e3c4264f23f34c16d5f12c17b5241f8c
+Subproject commit 9d3ac186501c299a627c1338b5e27e0b18f1ea01