Update git submodules

* Update helpcontent2 from branch 'master'
  to 86b579b23438f66bba07c3d138f4e1764ffe2b66
  - Update screenshots for Help pages
    
    Change-Id: I86e1814ec0f5e76b122f6e5e90944a07e38d51ce
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/141537
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index d599b91..86b579b 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit d599b915a77663f7766e12e3b818050a6738cbf5
Subproject commit 86b579b23438f66bba07c3d138f4e1764ffe2b66