Update git submodules

* Update helpcontent2 from branch 'master'
  to d13c501f790c5130fa5b23da99be6b92770a08d4
  - Related tdf#155723: "Cube" is in fact "Cuboid"
    
    Change-Id: I7a188a9053920c6fbd010a41ba005cbbd16a9392
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/163760
    Tested-by: Jenkins
    Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
    
diff --git a/helpcontent2 b/helpcontent2
index 6dfa124..d13c501 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 6dfa12485814931cf7161b53561940cb976116df
Subproject commit d13c501f790c5130fa5b23da99be6b92770a08d4