Update fake API to contain sample with binary body (#9610)

samples/client/petstore/javascript-promise-es6/docs/FakeApi.md

@@ -11,6 +11,7 @@ Method | HTTP request | Description
 [**fakeOuterNumberSerialize**](FakeApi.md#fakeOuterNumberSerialize) | **POST** /fake/outer/number | 
 [**fakeOuterStringSerialize**](FakeApi.md#fakeOuterStringSerialize) | **POST** /fake/outer/string | 
 [**fakePropertyEnumIntegerSerialize**](FakeApi.md#fakePropertyEnumIntegerSerialize) | **POST** /fake/property/enum-int | 
+[**testBodyWithBinary**](FakeApi.md#testBodyWithBinary) | **PUT** /fake/body-with-binary | 
 [**testBodyWithFileSchema**](FakeApi.md#testBodyWithFileSchema) | **PUT** /fake/body-with-file-schema | 
 [**testBodyWithQueryParams**](FakeApi.md#testBodyWithQueryParams) | **PUT** /fake/body-with-query-params | 
 [**testClientModel**](FakeApi.md#testClientModel) | **PATCH** /fake | To test \"client\" model
@@ -338,13 +339,57 @@ No authorization required
 - **Accept**: */*
 
 
+## testBodyWithBinary
+
+> testBodyWithBinary(body)
+
+
+
+For this test, the body has to be a binary file.
+
+### Example
+
+```javascript
+import OpenApiPetstore from 'open_api_petstore';
+
+let apiInstance = new OpenApiPetstore.FakeApi();
+let body = "/path/to/file"; // File | image to upload
+apiInstance.testBodyWithBinary(body).then(() => {
+  console.log('API called successfully.');
+}, (error) => {
+  console.error(error);
+});
+
+```
+
+### Parameters
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | **File**| image to upload | 
+
+### Return type
+
+null (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: image/png
+- **Accept**: Not defined
+
+
 ## testBodyWithFileSchema
 
 > testBodyWithFileSchema(fileSchemaTestClass)
 
 
 
-For this test, the body for this request much reference a schema named `File`.
+For this test, the body for this request must reference a schema named `File`.
 
 ### Example