* Update helpcontent2 from branch 'master'
  - tdf#121781 Clarify TZ info in Calc functions
    
    Notify user that TZ are not considered in date & time functions
    and in date & time formatted cells.
    
    Change-Id: I684039ebcc095fe4eefc2bf573df18679dd7f9f3
    Reviewed-on: https://gerrit.libreoffice.org/66468
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>