message: remove helm from deployment index
diff: @@ -29,9 +29,7 @@ This method is covered in [Building a Docker image](docker.md) and
  There is also an example of deploying on [Heroku](heroku.md), which only
  requires the first two steps.
  -An example of deploying Backstage with a [Helm chart](helm.md), a common pattern
  -in AWS, is also available. There is also a contrib guide to deploying Backstage
  -with
  +There is also a contrib guide to deploying Backstage with
  [AWS Fargate and Aurora PostgreSQL](https://github.com/backstage/backstage/blob/master/contrib/docs/tutorials/aws-fargate-deployment.md).
  Please consider contributing other deployment guides if you get Backstage set up
  