CodeGen from PR 16480 in Azure/azure-rest-api-specs

Update Microsoft.Chaos API Version 2021-09-15-preview types/experiment.json (#16480)

Author: SDKAuto

schemas/2021-09-15-preview/Microsoft.Chaos.json

@@ -544,7 +544,7 @@
             {
               "type": "string",
               "enum": [
-                "ResourceId"
+                "ChaosTarget"
               ]
             },
             {