UPSTREAM: <carry>: Updating ose-csi-snapshot-validation-webhook-conta…

…iner image to be consistent with ART

Reconciling with https://github.com/openshift/ocp-build-data/tree/c78b2b27f47b41d5d59449c863f3dea6eaa988b7/images/csi-snapshot-validation-webhook.yml

Dockerfile.webhook.openshift.rhel7

@@ -1,8 +1,8 @@
-FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.20-openshift-4.15 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.21-openshift-4.16 AS builder
 WORKDIR /go/src/github.com/kubernetes-csi/external-snapshotter
 COPY . .
 RUN make build
 
-FROM registry.ci.openshift.org/ocp/4.15:base-rhel9
+FROM registry.ci.openshift.org/ocp/4.16:base-rhel9
 COPY --from=builder /go/src/github.com/kubernetes-csi/external-snapshotter/bin/snapshot-validation-webhook /usr/bin/
 ENTRYPOINT ["/usr/bin/snapshot-validation-webhook"]