Update git submodules

* Update helpcontent2 from branch 'master'
  to 17ff420d14f2d7289bcee4ce7c652b4dfeb5a4d9
  - add missing < to embedvar 
    
    Change-Id: Ief1b8c7f78f6756d178c70d27020f6b483abfb24
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/149977
    Tested-by: Jenkins
    Reviewed-by: Seth Chaiklin <sdc.blanco@youmail.dk>
    
diff --git a/helpcontent2 b/helpcontent2
index 1964fca..17ff420 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 1964fcaee6441a576976a8730287ebd955f9128e
Subproject commit 17ff420d14f2d7289bcee4ce7c652b4dfeb5a4d9