Update git submodules

* Update helpcontent2 from branch 'master'
  to 87ab9fc48e05a39caf563be8f171d0ed737c50f7
  - tdf#153890  "apply to all similar texts" -> "apply to all other occurrences"
    
        plus remove <xml-lang>
    
    Change-Id: Id2a01e490cbae4c7a378d0d7834a0c7edbac97d3
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/148868
    Tested-by: Jenkins
    Reviewed-by: Seth Chaiklin <sdc.blanco@youmail.dk>
    
diff --git a/helpcontent2 b/helpcontent2
index 9309d69..87ab9fc 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 9309d69eab4f5bedc266b2286a9b0e5f0a06e295
Subproject commit 87ab9fc48e05a39caf563be8f171d0ed737c50f7