Update KeyVault.json - Add VaultAccessPolicyChangedEvent (#10569)

* Update KeyVault.json

* Update KeyVault.json

Author: jlichwa

specification/eventgrid/data-plane/Microsoft.KeyVault/stable/2018-01-01/KeyVault.json

@@ -312,6 +312,40 @@
           "type": "number"
         }
       }
+    },
+    "KeyVaultVaultAccessPolicyChangedEventData": {
+      "description": "Schema of the Data property of an EventGridEvent for an VaultAccessPolicyChanged event.",
+      "type": "object",
+      "properties": {
+        "id": {
+          "description": "The id of the object that triggered this event.",
+          "type": "string"
+        },
+        "vaultName": {
+          "description": "Key vault name of the object that triggered this event.",
+          "type": "string"
+        },
+        "objectType": {
+          "description": "The type of the object that triggered this event",
+          "type": "string"
+        },
+        "objectName": {
+          "description": "The name of the object that triggered this event",
+          "type": "string"
+        },
+        "version": {
+          "description": "The version of the object that triggered this event",
+          "type": "string"
+        },
+        "nbf": {
+          "description": "Not before date of the object that triggered this event",
+          "type": "number"
+        },
+        "exp": {
+          "description": "The expiration date of the object that triggered this event",
+          "type": "number"
+        }
+      }
     }
   }
 }