restore code block for reStructured text

Author: xabbuh

bundles/best_practices.rst

@@ -346,9 +346,9 @@ following standardized instructions in your ``README.md`` file.
         Open a command console, enter your project directory and execute the
         following command to download the latest stable version of this bundle:
 
-       ```bash
-        composer require <package-name>
-        ```
+        .. code-block:: terminal
+
+            composer require <package-name>
 
         Step 2: Enable the Bundle
         ~~~~~~~~~~~~~~~~~~~~~~~~~