Update git submodules

* Update helpcontent2 from branch 'master'
  to 9cd78ba1f7b77ed8a062906f2e553a4dbfca6ea4
  - tdf#134377 fix faulty embed tags in help
    
    Change-Id: I4895c9d9b05f05ffeeb6206fbe39d0ce4332d5f5
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/143726
    Tested-by: Jenkins
    Reviewed-by: Alain Romedenne <alain.romedenne@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 0ae4510..9cd78ba 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 0ae4510ed1ad0cdaf9ec52ff6bd4423c436dceae
Subproject commit 9cd78ba1f7b77ed8a062906f2e553a4dbfca6ea4