Update git submodules

* Update helpcontent2 from branch 'master'
  to 55e53682d9285f018385e273774a7d106a34efd4
  - HYPERLINK() clarify that it is not "CellText" but CellValue
    
    i.e. the argument and thus function result does not have to be of
    type text.
    
    Change-Id: I8e1917ecc5f740f880b5321c4c91f7512c9e3245
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/128844
    Reviewed-by: Eike Rathke <erack@redhat.com>
    Tested-by: Jenkins
    
diff --git a/helpcontent2 b/helpcontent2
index cc64499..55e5368 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit cc64499cecf5d0695bcf9b70b75ab99013270e38
Subproject commit 55e53682d9285f018385e273774a7d106a34efd4