Update README.md (#6656)

Add my slide to README.md

Author: juntaki

README.md

@@ -895,6 +895,7 @@ Presentations/Videos/Tutorials/Books
 - 2017/09/09 - [OpenAPIを利用したPythonWebアプリケーション開発](https://www.slideshare.net/TakuroWada/openapipythonweb) by [和田拓朗](https://github.com/taxpon) at [PyCon JP 2017](https://pycon.jp/2017/ja/)
 - 2017/09/21 - [Generating an Elastic Cloud Enterprise Client](https://www.elastic.co/blog/generating-an-elastic-cloud-enterprise-client) by [Greg Marzouka](https://github.com/gmarz) ([Elastic](https://www.elastic.co/))
 - 2017/09/26 - [How to Use IoT Application Enablement Api Hub JSON Descriptor in Postman and How to Generate Client Code](https://www.linkedin.com/in/radu-simen/) by [Radu Simen](https://www.linkedin.com/in/radu-simen/) ([SAP](https://www.sap.com/))
+- 2017/09/28 - [Swagger Codegenで APIクライアントgem 自動生成 #m3kt](https://speakerdeck.com/juntaki/swagger-codegende-apikuraiantogem-zi-dong-sheng-cheng-number-m3kt) by [Jumpei Takiyasu](https://github.com/juntaki)
 - 2017/09/30 - [Swaggerのテンプレートを魔改造した話 #渋谷java](https://www.slideshare.net/int128/swagger-80309224) by [Hidetake Iwata](https://github.com/int128) ([NTT DATA Corporation](http://www.nttdata.com/global/en/))
 - 2017/10/04 - [Enterprise-friendly Java client for Microsoft Machine Learning Server](https://blogs.msdn.microsoft.com/mlserver/2017/10/04/enterprise-friendly-java-client-for-microsoft-machine-learning-server/) by [Pratik Palnitkar](https://www.linkedin.com/in/pratikpalnitkar/) ([Microsoft](https://www.microsoft.com/))
 - 2017/10/08 - [Generating a REST Ada client with OpenAPI and Swagger Codegen](https://blog.vacs.fr/vacs/blogs/post.html?post=2017/10/08/Generating-a-REST-Ada-client-with-OpenAPI-and-Swagger-Codegen) by [Stephane Carrez](https://github.com/stcarrez)