Update git submodules

* Update helpcontent2 from branch 'master'
  - tdf#118076 Clarify use of regexp in writer search
    
    Writer only supports regex in searches. Wildcards restricted to Calc.
    
    Change-Id: If0ac52672a397832d48754e8221967b7b30b4df6
    Reviewed-on: https://gerrit.libreoffice.org/70551
    Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ 7d803461

-Subproject commit 282bc6b717716b077e95c0e1028ac820c4ea5da2
+Subproject commit 7d80346111e3945a8ec6cf5bbf5258eb7402d76d