Update git submodules

* Update helpcontent2 from branch 'master'
  - correct variable name in VBA example for WeekdayName function
    
    Change-Id: I79cbb241239f1f9cee59994b2b35e76703b1aa1a
    Reviewed-on: https://gerrit.libreoffice.org/58885
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 5c1d1eb3

-Subproject commit 7aba4422257bdcc2cf3e54d96c5e329d2b24e5d4
+Subproject commit 5c1d1eb33951982ffa5352980d4713489c0d98ae