kbs: pin down to released working kbs image version

Fix: #1688
Signed-off-by: Kartik Joshi <kartikjoshi@microsoft.com>

versions.yaml

@@ -27,7 +27,7 @@ tools:
 git:
   guest-components:
     url: https://github.com/confidential-containers/guest-components
-    reference: f20d4b59aa62032e82bd8d8107e6874d9618db50
+    reference: 480a13fb107a3321327af7082d785d209065857c
   kata-containers:
     url: https://github.com/kata-containers/kata-containers
     reference: d0df91935b8840036c2891b1f93dd8059ebe486a
@@ -40,7 +40,15 @@ git:
   opa:
     url: https://github.com/open-policy-agent/opa
     reference: v0.58.0
+  kbs:
+    url: https://github.com/confidential-containers/kbs
+    reference: 6a9be1cd9d1522d6892c36cb80c415af1078b1e2
 oci:
   pause:
     registry: docker://registry.k8s.io/pause
     tag: 3.6
+
+image:
+  kbs:
+    registry: ghcr.io/confidential-containers/staged-images/kbs
+    tag: latest