Fix link to AWS ECR PowerUser IAM documentation

Signed-off-by: Grayson Pike <graysonpike@gmail.com>

README.md

@@ -301,7 +301,7 @@ jobs:
 
 ### AWS Elastic Container Registry (ECR)
 
-Use an IAM user with the ability to [push to ECR with `AmazonEC2ContainerRegistryPowerUser` managed policy for example](https://docs.aws.amazon.com/AmazonECR/latest/userguide/ecr_managed_policies.html#AmazonEC2ContainerRegistryPowerUser).
+Use an IAM user with the ability to [push to ECR with `AmazonEC2ContainerRegistryPowerUser` managed policy for example](https://docs.aws.amazon.com/AmazonECR/latest/userguide/security-iam-awsmanpol.html#security-iam-awsmanpol-AmazonEC2ContainerRegistryPowerUser).
 Download the access keys and save them as `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY` [as secrets](https://docs.github.com/en/actions/configuring-and-managing-workflows/creating-and-storing-encrypted-secrets#creating-encrypted-secrets-for-a-repository)
 in your GitHub repo.