Update git submodules

* Update helpcontent2 from branch 'master'
  - fix commit 622324ec76e54ea1de99d6cea3debc2389049f5
    
    * SVG images cannot have undefined width and height
    * pick'd a mistake in setting generic images width and height
    
    Change-Id: I9f3e62e535c82d624c5c209b0e000784b2765604
    Reviewed-on: https://gerrit.libreoffice.org/67234
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ c19fd80d

-Subproject commit 622324ec76e54ea1de99d6cea3debc2389049f58
+Subproject commit c19fd80def3d34e65302f13863aa8aeb88e2de42