Updated GeoModel commit hash
One major change which comes with this update: Athena will be migrating
from the Athena-resident version of GeoModelXml to the standalone version
of GeoModelXml. There are only a handful client packages in the Athena
repository that are affected by this change, and all of them will need
to be fixed when Athena switches to the new version of atlasexternals.
See MR!46956 in the Athena repo