Update git submodules

* Update helpcontent2 from branch 'master'
  to 0c13b980b88e691ff48f69c1b65f0abb5246a208
  - Gradual Improvements
    
    All changes are tested with own builds on different builddirs (Windows)
    
    Main:
    - add alt text to icon(s)
    - moved paragraphs to where they belongs
    
    Further:
    - removed " xml-lang="en-US""
    - removed empty lines
    - new indentations for better readability
    - inline <tablecell> for better readability
    
    Change-Id: I0dde6eb6f23a77c215d26dd6129cac100029bc13
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/147537
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 6c6fa59..0c13b98 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 6c6fa59fd44ba6926e42c0eb37f6d63cf837ca04
Subproject commit 0c13b980b88e691ff48f69c1b65f0abb5246a208