Update git submodules

* Update helpcontent2 from branch 'master'
  - Fix double words
    
    Change-Id: Ibd67f546b323139eed589758721b1c00a8852502
    Reviewed-on: https://gerrit.libreoffice.org/57741
    Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
    

helpcontent2 @ bfe354c9

-Subproject commit 11a9f0c96e91153a458f8c7881c38fc7f728f2b4
+Subproject commit bfe354c9d4291ddebf32d0cddfca24ddfd3aa950