[Perf] Update EH pipeline to latest package (#5236)

Author: annatisch

tools/perf-automation/Azure.Sdk.Tools.PerfAutomation/tests.yml

@@ -527,9 +527,7 @@ Services:
       PrimaryPackage: azure-eventhub
       PackageVersions:
       - azure-core: 1.26.1
-        azure-eventhub: 5.10.0
-      - azure-core: 1.26.1
-        azure-eventhub: 5.10.1
+        azure-eventhub: 5.11.1
       - azure-core: source
         azure-eventhub: source
     JS: