Update git submodules

* Update helpcontent2 from branch 'master'
  - Related: tdf#121173 double spaces in sentences
    
    Change-Id: Icee0b15ad69fadc6e01a50b7f1c6485675ed42b5
    Reviewed-on: https://gerrit.libreoffice.org/64927
    Tested-by: Jenkins
Reviewed-by: Sophie Gautier <gautier.sophie@gmail.com>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 1c9e65b6

-Subproject commit 1dc486827433e96acbfd36663858c8b5f2b7a0a4
+Subproject commit 1c9e65b6315bb98a9a3110677ef442fb2b125a3a