UPSTREAM: <carry>: Updating openshift-enterprise-pod-container image to be consistent with ART for 4.21

Reconciling with https://github.com/openshift/ocp-build-data/tree/4fbe3fab45239dc4be6f5d9d98a0bf36e0274ec9/images/openshift-enterprise-pod.yml

Author: AOS Automation Release Team

build/pause/Dockerfile.Rhel

@@ -1,10 +1,10 @@
-FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.24-openshift-4.20 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.24-openshift-4.21 AS builder
 WORKDIR /go/src/github.com/openshift/kubernetes/build/pause
 COPY . .
 RUN mkdir -p bin && \
     gcc -Os -Wall -Werror -o bin/pause ./linux/pause.c
 
-FROM registry.ci.openshift.org/ocp/4.20:base-rhel9
+FROM registry.ci.openshift.org/ocp/4.21:base-rhel9
 COPY --from=builder /go/src/github.com/openshift/kubernetes/build/pause/bin/pause /usr/bin/pod
 LABEL io.k8s.display-name="OpenShift Pod" \
       io.k8s.description="This is a component of OpenShift and contains the binary that holds the pod namespaces." \