Explain that an Aurora DB instance must match the engine and version of the Aurora cluster
Explain that an Aurora DB instance must match the engine and version of the Aurora cluster

Makes it a bit clearer about how these interact.

We already have a reasonably thorough explanation of the difference between 'aurora' and 'aurora-mysql' engines in the aws_rds_cluster docs.

Also links to the available engine versions in the AWS API docs (why no IDs to anchor to? :( ).

Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,terraform-providers/terraform-provider-aws,nbaztec/terraform-provider-aws,nbaztec/terraform-provider-aws,nbaztec/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws,terraform-providers/terraform-provider-aws,nbaztec/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,terraform-providers/terraform-provider-aws,terraform-providers/terraform-provider-aws