Update git submodules

* Update helpcontent2 from branch 'master'
  to 7cf8e3f561e8b68134e46f874507fecd25b9f5b1
  - Revert "tdf#33749 - HTML Help pages - reflect changes to cell merge in Calc"
    
    This reverts commit 7a45cfda035abefcda03767a4c81f93c69d593b1.
    
    Reason for revert: Change to core have been reverted due to their regressive nature as reported. This revert is for sync. There is a new patchset coming to resolve the issue.
    
    Change-Id: I30e224b7fc79a9620058e26ee5055f9ff5ce8819
    Reviewed-on: https://gerrit.libreoffice.org/c/help/+/122647
    Tested-by: Jenkins
    Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
    
diff --git a/helpcontent2 b/helpcontent2
index e7ef99c..7cf8e3f5 160000
--- a/helpcontent2
+++ b/helpcontent2
@@ -1 +1 @@
Subproject commit e7ef99cadf81a72688dbae1f8ba9f99c3b568aa7
Subproject commit 7cf8e3f561e8b68134e46f874507fecd25b9f5b1