Update git submodules

* Update helpcontent2 from branch 'master'
  - Drop Personalization page
    
    After core commit e1e9e2aa
    
    Change-Id: Ie035df76473890f634d4457ccbf1201b9998c5ff
    Reviewed-on: https://gerrit.libreoffice.org/72977
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ bc305442

-Subproject commit a8a0ba510bc1b5d73d5267e1b36a0e00f4117816
+Subproject commit bc3054425edfff31de5beafa8546213c19c6634d