Add reference attribute

http/exposed-panels/oracle-business-intelligence.yaml

@@ -5,6 +5,8 @@ info:
   author: DhiyaneshDk,righettod
   severity: info
   description: Oracle Business Intelligence login panel was detected.
+  reference:
+    - https://www.oracle.com/business-analytics/business-intelligence/technologies/bi.html
   classification:
     cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
     cwe-id: CWE-200