Update git submodules

* Update helpcontent2 from branch 'master'
  to 934cd73d20322b68c830c78ac596eeddcdf85051
  - Improve "Enable regular expressions in formulas" section
    
    Add a link to regular expressions list; add LOOKUP to affected functions
    
    Change-Id: Ic753552b916bdccfcb13335ff32490babe0d840a
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/104836
    Tested-by: Jenkins
    Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
    
diff --git a/helpcontent2 b/helpcontent2
index c1b3e8e..934cd73 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit c1b3e8ec874a7d3fa2463a17bd55452315cec6df
Subproject commit 934cd73d20322b68c830c78ac596eeddcdf85051