Update git submodules

* Update helpcontent2 from branch 'master'
  to 9512494c315aee4af46fa9a9eca0e4be0210e3cd
  - tdf#138301,tdf#130738 add "Custom" condition in Data>Validity-Criteria help
    
        + add Custom and explanation to list of Allow conditions
        * correction to condition:  "Whole Number" --> "Whole Numbers"
        * update two <h2>, one <h3>
    
    Change-Id: I1a6034af51c8dc5afe5a44a0043e26556cf94f8f
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/107374
    Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
    Reviewed-by: Seth Chaiklin <sdc.blanco@youmail.dk>
    Tested-by: Jenkins
    
diff --git a/helpcontent2 b/helpcontent2
index c9f0224..9512494 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit c9f02245818790a55c64b9dc66da43cdbb20af6a
Subproject commit 9512494c315aee4af46fa9a9eca0e4be0210e3cd