Upgrade Container Image K8s

1. Add or change the image(s) in the course.yml file
2. Connect to the VPN (if necessary)
3. Use autohelm to initiate a dry run autohelm plot course course.yml --heading <name_of_image_here> --heading <name_of_another_image_here> --dry-run
4. Once the dry run 'passes', make the changes in your K8s cluster without the dry-run flag autohelm plot course course.yml --heading <name_of_image_here> --heading <name_of_another_image_here>
5. Check that your new pods are running kubectl -n <name_space> get pods