Update git submodules

* Update helpcontent2 from branch 'libreoffice-6-1'
  - tdf#115254 Some branch bookmarks are not working 3
    
    dialogs from chart2
    
    Change-Id: I97e08c5b8ca2200f143073abadb355da99b38b9a
    Reviewed-on: https://gerrit.libreoffice.org/57451
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 6140968..a9a4b8c 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 61409684fa69145a6828a2856e1df7540a7cb018
Subproject commit a9a4b8c89a11d6c2955c52b9bda096b943df0476