Download IAR docker image from AWS ECR

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: I5e167da0fb50cac1ce6a8e1ae88272861053e5f7
diff --git a/docker_templates_amd64.yml b/docker_templates_amd64.yml
index 2969677..1e1d24a 100644
--- a/docker_templates_amd64.yml
+++ b/docker_templates_amd64.yml
@@ -38,7 +38,7 @@
       - PLANTUML_JAR_PATH : '/usr/share/plantuml/plantuml.jar'
 
 - docker-amd64-tf-m-jammy-iar:
-  docker_image_name: 'ci-amd64-tf-m-iar-ubuntu:jammy-iar'
+  docker_image_name: '987685672616.dkr.ecr.us-east-1.amazonaws.com/iar:jammy-tf-m-iar'
   labels: 'docker-amd64-tf-m-jammy-iar'
   launch_method: 'launch_ssh'
   ssh: !include docker_ssh_buildslave.yml