[post-land] propagate diem name change

Closes: diem#6936

Author: sausagee

.github/workflows/post-land.yml

@@ -33,7 +33,7 @@ jobs:
           status=1
           while [[ $status != 0 && $retry -lt $RETRIES ]]; do
             status=0
-            for image in libra/validator libra/validator_tcb libra/init libra/cluster_test; do
+            for image in diem/validator diem/validator_tcb diem/init diem/cluster_test; do
               aws ecr describe-images --region $AWS_REGION --repository-name $image --image-ids=imageTag=$IMAGE_TAG
               status=$((status + $?))
             done