Fix variable name

Author: jovial

etc/kayobe/kolla-image-tags.yml

@@ -2,7 +2,7 @@
 # Dict of Kolla image tags to deploy for each service.
 # Each key is the tag variable prefix name, and the value is another dict,
 # where the key is the OS distro and the value is the tag to deploy.
-kayobe_image_tags:
+kolla_image_tags:
   openstack:
     rocky: 2023.1-rocky-9-20231011T200357
     ubuntu: 2023.1-ubuntu-jammy-20231011T200357
@@ -30,4 +30,3 @@ kayobe_image_tags:
   opensearch:
     rocky: 2023.1-rocky-9-20231214T151917
     ubuntu: 2023.1-ubuntu-jammy-20231214T151917
-