Update demo container images to use `vortex` name

[AlexSkrypnyk]

After renaming the project to Vortex, the demo images remained with the old name. They now need to be renamed:

drevops/drevops-mariadb-drupal-data-demo-destination-10.x -> drevops/vortex-dev-mariadb-drupal-data-demo-destination-10.x