Update Omnibus libxml2 checksum
Update the omnibus libxml2 checksum to avoid manual checksum updates and to avoid additional review cycles.
Relates https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8553
Update the omnibus libxml2 checksum to avoid manual checksum updates and to avoid additional review cycles.
Relates https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8553