Update git submodules

* Update helpcontent2 from branch 'master'
  - Remove superfluous string in impress/Draw contents
    
    Keep same Contents structure as other apps
    
    Change-Id: I1afc21e3581c3200ce6821ee3594686a1f8a70dc
    Reviewed-on: https://gerrit.libreoffice.org/73571
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 2eb12571

-Subproject commit dcedbce9f56f3a315db998e69b5fe5925ae189a6
+Subproject commit 2eb1257145949b53d085edf37d7c599bf17f0051