Update git submodules

* Update helpcontent2 from branch 'master'
  - correct command names for opening/saving remote files
    
    Change-Id: I2fc0b696a60dbdb3e18dc483b67c5ad57836f211
    Reviewed-on: https://gerrit.libreoffice.org/64675
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 79b0e57e

-Subproject commit 1d927d2d9747e320a04aeaf5096d80a6ff6f7fa5
+Subproject commit 79b0e57e1cbc1b9a3c56f6fd60369b26fef92879