Update git submodules

* Update helpcontent2 from branch 'master'
  to 2dfdb43a09ecc8d6082240bf6b9a59ae964633bc
  - All large icons are 24 × 24 pixel ever since Galaxy was removed
    
    See core commit bea44e5c1b982d05314b72452b94fe288071a496.
    
    Change-Id: Ie09f3220a2add3292e55cbab088131c89c5bed91
    
diff --git a/helpcontent2 b/helpcontent2
index 3d03b85..2dfdb43 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 3d03b85c641c287d42edf6703c6f780896c3010d
Subproject commit 2dfdb43a09ecc8d6082240bf6b9a59ae964633bc