Update git submodules

* Update helpcontent2 from branch 'master'
  - Fix typo
    
    Change-Id: I503abdd631c5ee53466f9bc73be0650e69098806
    Reviewed-on: https://gerrit.libreoffice.org/65880
    Tested-by: Jenkins
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
    

helpcontent2 @ d6bc711d

-Subproject commit b01f85baef364236cb68dd0dbeb0bcb7513bd85c
+Subproject commit d6bc711d16369cb464c0cdf67462478411edb4b0