Update image-builder submodule to v0.1.46

[azimuth-automation-bot]

This PR was created automatically to update the Kubernetes
image-builder submodule to v0.1.46.

[JohnGarbutt]

==> openstack.kubernetes: fatal: [default]: FAILED! => {"msg": "The task includes an option with an undefined variable.. 'containerd_service_url' is undefined\n\nThe error appears to be in '/home/runner/work/azimuth-images/azimuth-images/vendor/image-builder/images/capi/ansible/roles/containerd/tasks/main.yml': line 33, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Download containerd.service\n  ^ here\n"}