Clarify DNS record resource_group_name usage in documentation.

[johnyesberg]

For most resources, the resource_group_name attribute is used to specify the group
into which the new resource will be added. In the case of DNS records, the resource_group_name
specifies the group in which the parent can be found.

I had a DNS Zone in one resource group, and was attempting to create a CNAME record in a different resource group (as though that were possible). This wasn't working - 404 error indicated that the parent resource could not be found. When I realised that the resource_group_name attribute was used to locate the DNS Zone, rather than to select which group the new resources should be placed in, it all worked.

I wonder whether my proposed changes to the documentation might help others in future.

[tombuildsstuff]

LGTM - thanks for this @johnyesberg

[ghost]

This has been released in version 1.35.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 1.35.0"
}
# ... other configuration ...

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

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