ran make dockerfiles as per docker build images fail check

Author: rejain789

.pipelines/build/dockerfiles/cni.Dockerfile

@@ -3,7 +3,7 @@
 ARG ARCH
 
 # mcr.microsoft.com/oss/kubernetes/windows-host-process-containers-base-image:v1.0.0
-FROM --platform=windows/${ARCH} mcr.microsoft.com/oss/kubernetes/windows-host-process-containers-base-image@sha256:b4c9637e032f667c52d1eccfa31ad8c63f1b035e8639f3f48a510536bf34032b AS windows
+FROM --platform=windows/${ARCH}  AS windows
 ARG ARTIFACT_DIR .
 
 COPY ${ARTIFACT_DIR}/bin/dropgz.exe /dropgz.exe

.pipelines/build/dockerfiles/cns.Dockerfile

@@ -3,19 +3,19 @@
 ARG ARCH
 
 # mcr.microsoft.com/oss/kubernetes/windows-host-process-containers-base-image:v1.0.0
-FROM --platform=windows/${ARCH} mcr.microsoft.com/oss/kubernetes/windows-host-process-containers-base-image@sha256:b4c9637e032f667c52d1eccfa31ad8c63f1b035e8639f3f48a510536bf34032b AS windows
+FROM --platform=windows/${ARCH}  AS windows
 ARG ARTIFACT_DIR .
 
 COPY ${ARTIFACT_DIR}/bin/azure-cns.exe /azure-cns.exe
 ENTRYPOINT ["azure-cns.exe"]
 EXPOSE 10090
 
 # mcr.microsoft.com/azurelinux/base/core:3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/azurelinux/base/core@sha256:833693619d523c23b1fe4d9c1f64a6c697e2a82f7a6ee26e1564897c3fe3fa02 AS build-helper
+FROM --platform=linux/${ARCH}  AS build-helper
 RUN tdnf install -y iptables
 
 # mcr.microsoft.com/azurelinux/distroless/minimal:3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/azurelinux/distroless/minimal@sha256:d784c8233e87e8bce2e902ff59a91262635e4cabc25ec55ac0a718344514db3c AS linux
+FROM --platform=linux/${ARCH}  AS linux
 ARG ARTIFACT_DIR .
 
 COPY --from=build-helper /usr/sbin/*tables* /usr/sbin/