Update git submodules

* Update helpcontent2 from branch 'master'
  - Explain formatted display in search for Calc
    
    Was missing in the find&replace help page
    
    Change-Id: I6b997fa34d7784be1f143e6403cd645327415cde
    Reviewed-on: https://gerrit.libreoffice.org/73017
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 4a3888b8

-Subproject commit bc3054425edfff31de5beafa8546213c19c6634d
+Subproject commit 4a3888b8588facb3547bb2fcb995b0ab9220fa87