Update git submodules

* Update helpcontent2 from branch 'master'
  to e3b1cce7dde7e964c7670dd24a167e750654685a
  - tdf#132398 Update icons for Online help navigation
    
    Change-Id: Id6c5bb5d486cd045238205318a6f99339716c117
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/144138
    Tested-by: Jenkins
    Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
    
diff --git a/helpcontent2 b/helpcontent2
index cd924ae..e3b1cce 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit cd924ae6a0bd8fbaad2ee4bcac7d4ccd7c689a59
Subproject commit e3b1cce7dde7e964c7670dd24a167e750654685a