Update detect_dns_query_to_decommissioned_s3_bucket.yml

Fix bad alignment of tests section

Author: pyth0n1c

detections/network/detect_dns_query_to_decommissioned_s3_bucket.yml

@@ -47,7 +47,7 @@ tags:
   - Splunk Enterprise Security
   - Splunk Cloud
   security_domain: network
-  tests:
+tests:
 - name: Baseline Dataset Test
   attack_data:
   - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1485/decommissioned_buckets/cloudtrail.json