fix import

Author: yeoldegrove

src/python_gardenlinux_lib/oci/registry.py

@@ -26,6 +26,7 @@
 from oras.provider import Registry
 from oras.schemas import manifest as oras_manifest_schema
 
+from python_gardenlinux_lib.cname import get_flavor_from_cname
 from python_gardenlinux_lib.crypto import (
     calculate_sha256,
     verify_sha256,