fix: pass body to error deserializer

Author: AllanZhengYP

clients/node/client-rds-data-node/protocol/AwsRestJson1_1.ts

@@ -95,7 +95,7 @@ export async function executeStatementAwsRestJson1_1Deserialize(
 async function executeStatementAwsRestJson1_1DeserializeError(
   output: HttpResponse
 ): Promise<ExecuteStatementResponse> {
-  let data = await parseBody(output);
+  let data = await parseBody(output.body);
   if (output.statusCode === 400 && data.dbConnectionId !== undefined) {
     return Promise.reject({
       __type: "com.amazon.rdsdataservice#StatementTimeoutException",