Amazon EventBridge Update: Improve Endpoint Ruleset test coverage.

Author: AWS

.changes/next-release/feature-AmazonEventBridge-51155bc.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "Amazon EventBridge",
+    "contributor": "",
+    "description": "Improve Endpoint Ruleset test coverage."
+}