Update git submodules

* Update helpcontent2 from branch 'libreoffice-6-4'
  - Add PDF Export Digital signature Page screenshot
    
    Change-Id: I463c27689ddc53d8c66b88c835e189956d078652
    Reviewed-on: https://gerrit.libreoffice.org/83143
    Tested-by: Jenkins
    Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    (cherry picked from commit c4a358cbe4986b09ccbc73a61fe4c4e2cadacd8f)
    Reviewed-on: https://gerrit.libreoffice.org/83502
    

1 files changed, 0 insertions, 0 deletions

diff --git a/helpcontent2 b/helpcontent2
-Subproject 598218ecbf5540e4fc8aaa88197f40c2c4b7767
+Subproject 2b12bc5831ad82ffd359487f8a608fa35b6ce3f