Update git submodules

* Update helpcontent2 from branch 'master'
  - Fix typo
    
    Courtesy of Cathy Crumbley
    
    Change-Id: Ie2796bebed2007545d2214d8af8e52f3b69cb759
    Reviewed-on: https://gerrit.libreoffice.org/72263
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ ec92232d

-Subproject commit 8ba1c1976c652b804a02267a8035606b10db2682
+Subproject commit ec92232db1d9ce394b94778f9e7adaf02bfa2da1