chore: add note about apimodel in issue template (#1478)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -10,6 +10,7 @@ assignees: ''
 **Describe the bug**
 
 **Steps To Reproduce**
+<!-- Please include the apimodel used to deploy the cluster if applicable (make sure to redact any secrets) -->
 
 **Expected behavior**