Update git submodules

* Update helpcontent2 from branch 'master'
  to 2bc84bb9807e3929f7f34a934d1b4ffe772eaa4e
  - nospin hack no longer in use
    
    Change-Id: Id1c63826821195224594d5cd920a9e198da1d585
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/94733
    Tested-by: Jenkins
    Reviewed-by: Caolán McNamara <caolanm@redhat.com>
    
diff --git a/helpcontent2 b/helpcontent2
index 611f06e..2bc84bb 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 611f06ecc3dd2edb2102e0cc3bd1c884590c9558
Subproject commit 2bc84bb9807e3929f7f34a934d1b4ffe772eaa4e