Update git submodules

* Update helpcontent2 from branch 'master'
  - related: tdf#121173: double space cleanups
    
    ..and some more improvements (hopefully) 
    
    Change-Id: I17e6656ff0f0274c342b62e72405d396437c8964
    Reviewed-on: https://gerrit.libreoffice.org/62923
    Tested-by: Jenkins
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>
    

helpcontent2 @ 10694883

-Subproject commit c8484f805ec3bce0484d63ca919101dc3843b9ff
+Subproject commit 10694883a078bc2edd7f8f6f74c2a75fce0e2080