Terraform v12doesn`t allow naming to start with a digit

dd2f is exporting resources with the datadog id as name 

```
resource "datadog_monitor" "123" {

}
```

Terraform v12 doesn`t allow a name to start with a digit.

```
: resource "datadog_monitor" "123" {

A name must start with a letter and may contain only letters, digits,
underscores, and dashes.
```
