add Contributing in readme file

Author: peng3307165

README.md

@@ -249,3 +249,6 @@ Future Features Under Development:
 - [ ] More versatile embedding models and similarity evaluation algorithms.
 ## Acknowledgements
 This project has referenced the following open-source projects. We would like to express our gratitude to the projects and their developers for their contributions and research.<br />[GPTCache](https://github.com/zilliztech/GPTCache)
+
+## Contributing
+ModelCache is a captivating and invaluable project, whether you are an experienced developer or a novice just starting out, your contributions to this project are warmly welcomed. Your involvement in this project, be it through raising issues, providing suggestions, writing code, or documenting and creating examples, will enhance the project's quality and make a significant contribution to the open-source community.

README_CN.md

@@ -249,3 +249,5 @@ https://mp.weixin.qq.com/s/ExIRu2o7yvXa6nNLZcCfhQ
 ## 致谢
 本项目参考了以下开源项目，在此对相关项目和研究开发人员表示感谢。<br />[GPTCache](https://github.com/zilliztech/GPTCache)
 
+## Contributing
+ModelCache是一个非常有趣且有用的项目，我们相信这个项目有很大的潜力，无论你是经验丰富的开发者，还是刚刚入门的新手，都欢迎你为这个项目做出一些贡献，包括但不限于：提交问题和建议，参与代码编写，完善文档和示例。你的参与将会使这个项目变得更好，同时也会为开源社区做出贡献。