[Documentation]: It is not clear are multiple tag_key/tag_value are supported?

#### Overview of the Issue

On the AWS in the same region we have multiple clusters. Thus `provider=aws tag_key=ConsulAutoJoin tag_value=auto-join` sees EC2 instances from a different VPCs, though it can not communicate with each other, because each project is located in a separate subnet.

So I would to use:
`provider=aws tag_key=ConsulAutoJoin tag_value=auto-join tag_key=project_name tag_value=project1`

It is not clear from the documentation: are multiple tag_key/tag_value are supported as in the example above?
https://developer.hashicorp.com/consul/docs/install/cloud-auto-join#amazon-ec2-and-ecs

Start with the Amazon EC2 and ECS section of the linked Consul cloud auto-join documentation and verify whether repeated tag_key/tag_value pairs are supported. Done means the page explicitly documents the supported syntax and how multiple tags are interpreted, or clearly states that the example is unsupported.

Written by the indexing model from the issue text.