Update git submodules

* Update helpcontent2 from branch 'master'
  to 8d70f37fcc80c0b6c4fbfa36709ec1b1e9002a40
  - refactoring Line tab help pages
    
          text/shared/01/05200100.xhp  (Line dialog)
            *refactor <h1>,<h2>,<h3>
    
          text/shared/01/05200300.xhp (Arrow Styles tab)
            *refactor <h1>,<h2>
    
          text/shared/00/00040502.xhp  (#line2: "howtoget" line tab)
             +add appl-switch for "howtoget" Line tab
    
    Change-Id: I800a4c69ffce4edc88aec86b5e6cbe6a2e4d4f9c
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/132707
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 8219f0b..8d70f37 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 8219f0b1d741dc3e3927a1fb9ee4fc0b916d57e1
Subproject commit 8d70f37fcc80c0b6c4fbfa36709ec1b1e9002a40