Update README.md

Author: 梶塚太智

README.md

@@ -32,6 +32,7 @@ This is example code output FizzBuzz in the Stack Programing Language.
 
 ## Contribute
 Any contributions are welcome! Feel free to open issues for bug reports or feature requests, and submit pull requests to enhance the Stack Programing Language.
+More informations are in the [CONTRIBUTING](CONTRIBUTING.md) file. 
 
 ## License
 Stack programing language is freedom and open source software under the MIT License. everyone can use, modify, and share it. See the [LICENSE](LICENSE) file for details.