Update git submodules

* Update helpcontent2 from branch 'master'
  - tdf#99517 help for CONCAT, TEXTJOIN, IFS, SWITCH
    
    CONCAT, TEXTJOIN, IFS, SWITCH
    
    Change-Id: Ic1d74ac8b810bd0c0d4b4f570baab1d1e270f912
    Reviewed-on: https://gerrit.libreoffice.org/71339
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 7b20c74a

-Subproject commit 0a874cee4a5d694b6c055b896d4dc64f7151b001
+Subproject commit 7b20c74a33942157b02b99353aa98e45f7c0a111