Update git submodules

* Update helpcontent2 from branch 'master'
  to a002539ad82004b15916510d2feaec5771a9c198
  - tdf#155875 Tab'd UI cmds Writer/Format in Help(18)
    
    + refactoring
    + Writer Format menu (part 18)
    + Anchors (include Calc image anchor)
    
    Change-Id: I0f9f1f36d707ae0267c2fe23ab3382b6014adf16
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/156073
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    
diff --git a/helpcontent2 b/helpcontent2
index 69be688..a002539 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit 69be688d8006621fbf52a5a13cb7a46caaba4d62
Subproject commit a002539ad82004b15916510d2feaec5771a9c198