Update git submodules

* Update helpcontent2 from branch 'master'
  to e39f60457632012b51159df1616b3cce8514ebca
  - Synch term between UI and Help - Slide menu
    
    Change-Id: I0b4d924befa43633f9ef3da1cdb99b3ac760416f
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/153832
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 6bba967..e39f604 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 6bba9672d36c691c779ce6d40bbf816e661ec882
Subproject commit e39f60457632012b51159df1616b3cce8514ebca