chore(docs): improve custom checks docs (#2428)

docs/tutorials/misc.md

@@ -66,6 +66,12 @@ The custom checks folder must contain one subfolder per check, each subfolder mu
 >The check name must start with the service name followed by an underscore (e.g., ec2_instance_public_ip).
 
 To see more information about how to write checks see the [Developer Guide](../developer-guide/#create-a-new-check-for-a-provider).
+
+> If you want to run ONLY your custom check(s), import it with -x (--checks-folder) and then run it with -c (--checks), e.g.:
+```console
+prowler aws -x s3://bucket/prowler/providers/aws/services/s3/s3_bucket_policy/ -c s3_bucket_policy
+```
+
 ## Severities
 Each of Prowler's checks has a severity, which can be:
 - informational