1.20.0 is missing from AWS ECR

[sir-sigurd]

$ docker pull public.ecr.aws/nginx/nginx:1.20.0
Error response from daemon: manifest for public.ecr.aws/nginx/nginx:1.20.0 not found: manifest unknown: Requested image not found

[thresheek]

Thanks @sir-sigurd - I've fixed the script and pushed the updated images to AWS ECR.