Update git submodules

* Update helpcontent2 from branch 'libreoffice-6-2'
  - tdf#119415 Add placeholder text for index filter
    
    Change-Id: If7a0a863eb6b8bb95a5b6236f4f3d490739810a1
    Reviewed-on: https://gerrit.libreoffice.org/63672
    Tested-by: Jenkins
    Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
    Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
    (cherry picked from commit 126ef50e9756e79bf5b500edeaa9275260a1b7d3)
    Reviewed-on: https://gerrit.libreoffice.org/63682
    
diff --git a/helpcontent2 b/helpcontent2
index 8aef24e..10c207f 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 8aef24ea353e04d75360d0b94ccbca6c6c8e9635
Subproject commit 10c207f682a65bb3ff434689822024e828308341