CloudFormation Template URL Not Accessible for AWS Installation

[dlackty]

Describe the bug
While following the instructions in the AWS Installation Guide, I encountered an issue with the CloudFormation template. The doc references creating a CloudFormation stack with a provided template, but the URL to the template is inaccessible.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://authentik-cloudformation-templates.s3.amazonaws.com/authentik.ecs.latest.yaml
2. See AccessDenied error

<Error>
<Code>AccessDenied</Code>
<Message>Access Denied</Message>
<RequestId>TCTQ29BT4VTACRW3</RequestId>
<HostId>eV/rfPR1Ewd6FpkjbHm5McyHFXHybWiDNgh8gt2c2932ZQYMS7LyF4w02PTLXSQcdz0U3iSKUUWzGdryv6t493zfbvk2+mYrLIxoBB+qT1g=</HostId>
</Error>

Expected behavior
The CloudFormation template URL should be accessible, allowing users to proceed with the AWS installation.