Update git submodules

* Update helpcontent2 from branch 'master'
  to 68e39672b4fdc9719f2e0a85e83f2d6fff6c180c
  - Toc update to document Python resources
    
    Python modules deserve to be highlited:
    - scriptforge
    - uno
    - msgbox
    
    Change-Id: I6d0cad668527b17b1f3ca898d5001768cb30a318
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/135947
    Tested-by: Jenkins
    Reviewed-by: Alain Romedenne <alain.romedenne@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 7a93d6a..68e3967 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 7a93d6a4ae5adb871cbd7cd54f4cc71fed63e27e
Subproject commit 68e39672b4fdc9719f2e0a85e83f2d6fff6c180c