Make the bootc image point to the public image

Tag the image with the public registry. In this way, the image
embedded in the bootc disk image now points to:

bootc status
● Booted image: ghcr.io/alicefr/bink/bink-node:v1.35-fedora-44
        Digest: sha256:b1dd0021b320fd9220749c43faee982c83592af501b2b74d5e87607ec77dbe39 (amd64)
     Timestamp: 2026-06-03T11:47:46Z

Signed-off-by: Alice Frosi <afrosi@redhat.com>

Author: alicefr

node-images/fedora/Makefile

@@ -6,8 +6,9 @@ DISK_SIZE ?= 10G
 BUILD_MEMORY ?= 4G
 
 IMAGE_TAG ?= v$(KUBE_MINOR)-fedora-$(FEDORA_VERSION)
-BOOTC_IMAGE ?= localhost/bink-node:$(IMAGE_TAG)
-NODE_IMAGE ?= localhost/bink-node:$(IMAGE_TAG)-disk
+REGISTRY ?= ghcr.io/alicefr/bink
+BOOTC_IMAGE ?= $(REGISTRY)/bink-node:$(IMAGE_TAG)
+NODE_IMAGE ?= $(REGISTRY)/bink-node:$(IMAGE_TAG)-disk
 
 # Build the OCI bootc image (k8s + cri-o)
 build-bootc-image: