Update git submodules

* Update helpcontent2 from branch 'master'
  - Related: tdf#121173 double spaces in sentences
    
    Change-Id: I3bbcb7c64473be6ae9ffa165d448ed90a9a67b1d
    Reviewed-on: https://gerrit.libreoffice.org/64899
    Tested-by: Jenkins
Reviewed-by: Sophie Gautier <gautier.sophie@gmail.com>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 6849bd0b

-Subproject commit 1c9e65b6315bb98a9a3110677ef442fb2b125a3a
+Subproject commit 6849bd0b34db2341fa3e99707dc32b1facdd7da2