Refactor CONTRIBUTING.md: Update code snippets and branch naming conventions

Author: drbarzaga

CONTRIBUTING.md

@@ -8,28 +8,28 @@ Thank you for considering contributing to React Frontend Toolkit. Here are some
 
 2. **Clone the Repository**: Clone the forked repository to your local machine.
 
-   ```sh
+   ```bash
    git clone [email protected]:drbarzaga/React-Frontend-Toolkit.git
    ```
 
 3. **Create a Branch**: Create a new branch for your feature or bug fix.
 
-   ```sh
+   ```bash
    git checkout -b feature/your-feature-name
    ```
 
 4. **Make Changes**: Make your changes in the codebase.
 
 5. **Commit Changes**: Commit your changes with a clear and concise commit message.
 
-   ```sh
+   ```bash
    git add .
    git commit -m "Add feature: your feature name"
    ```
 
 6. **Push Changes**: Push your changes to your forked repository.
 
-   ```sh
+   ```bash
    git push origin feature/your-feature-name
    ```