Update git submodules

* Update helpcontent2 from branch 'master'
  to 4847445f1d2ba57767dfb3be236b112e7187a04d
  - tdf#133640 Replace problematic colors to make links discernible
    
    … and add back their default underlines, but dimmed.
    I still think this looks busy, but I shall get used to it.
    It’s more a11y-friendly this way.
    
    Also, the old, green footer line is gone, since it doesn’t really
    fit in since commit 4d6b5e5f74c50cc440a46fada8fa89ad2f946749.
    
    Change-Id: Ie9feb3cc232ec249dbe323c2ec4b761c12e91ad6
    
diff --git a/helpcontent2 b/helpcontent2
index 35a0244..4847445 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 35a0244b536543f2f4a7bb0b1350e6b3caa295dd
Subproject commit 4847445f1d2ba57767dfb3be236b112e7187a04d