Update git submodules

* Update helpcontent2 from branch 'master'
  - Fix typos
    
    Change-Id: I79db4363c15786f3829faf24621f073cf481191a
    Reviewed-on: https://gerrit.libreoffice.org/72257
    Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
    

helpcontent2 @ bb77ba98

-Subproject commit ec92232db1d9ce394b94778f9e7adaf02bfa2da1
+Subproject commit bb77ba985843f99ccf7df959a97c08e6fe913d2e