only add related_integration if on the correct stack (#2234)

(cherry picked from commit 89cdae8)

Author: Mikaayenson

detection_rules/rule.py

@@ -714,7 +714,7 @@ def _add_related_integrations(self, obj: dict) -> None:
                             if package["integration"] not in policy_templates:
                                 del package["integration"]
 
-            obj.setdefault("related_integrations", package_integrations)
+                obj.setdefault("related_integrations", package_integrations)
 
     def _add_required_fields(self, obj: dict) -> None:
         """Add restricted field required_fields to the obj, derived from the query AST."""