docs(registry): fix import command for registry namespace (#657)

Co-authored-by: Rémy Léone <[email protected]>

Author: vincentfretin

docs/resources/registry_namespace_beta.md

@@ -48,5 +48,5 @@ In addition to all arguments above, the following attibutes are exported:
 Container Registry Namespace can be imported using the `{region}/{id}`, eg.
 
 ```bash
-$ terraform import scaleway_container_registy.cr01 fr-par/11111111-1111-1111-1111-111111111111
-```
+$ terraform import scaleway_registry_namespace_beta.main fr-par/11111111-1111-1111-1111-111111111111
+```