Fix code block formatting in README.md

Author: sgc93

README.md

@@ -21,7 +21,7 @@ npm install wrap-git
 ```
 or with yarn:
 
-```
+```bash
 yarn add wrap-git
 ```
 
@@ -59,4 +59,4 @@ This project is licensed under the MIT License. See the LICENSE file for details
 ## Author
 
 Developed and maintained by [smachew G.](https://github.com/sgc93).
-Built with ❤️ using Node.js and TypeScript.
+Built with ❤️ using Node.js and TypeScript.