ubi-minimal doesn't support arm32, remove from build manifest

docker-buildx.sh

@@ -3,7 +3,7 @@
 sudo sysctl net.ipv6.conf.wlp59s0.disable_ipv6=1
 
 docker buildx build --push --no-cache -t "minio/minio:latest" \
-       --platform=linux/arm,linux/arm64,linux/amd64,linux/ppc64le,linux/s390x \
+       --platform=linux/arm64,linux/amd64,linux/ppc64le,linux/s390x \
        -f Dockerfile.release .
 
 docker buildx prune -f
@@ -11,7 +11,7 @@ docker buildx prune -f
 release=$(git describe --abbrev=0 --tags)
 
 docker buildx build --push --no-cache -t "minio/minio:${release}" \
-       --platform=linux/arm,linux/arm64,linux/amd64,linux/ppc64le,linux/s390x \
+       --platform=linux/arm64,linux/amd64,linux/ppc64le,linux/s390x \
        -f Dockerfile.release .
 
 docker buildx prune -f