Invalid link to certificate-manager policy in README

[mtszkw]

FYI, In this section of README:

certificate-manager
Needs policies that allows it to automatically create entries in Route53 in order to allow for DNS-01 solving.

Placeholder: <<role_arn.cert_manager>>
Example ARN: arn:aws:iam::123456789012:role/my-cluster_cert-manager_cert-manager
Policy: link

Link to certificate-manager policy doesn't work, it is not present in iam-policies directory.

[mtszkw]

In addition to that: link to autoscaler policy doesn't work either (file was renamed).

[davidspek]

That's for bringing this up. I'll take a look at this in a moment.