Update Markdown formatting

CONTRIBUTING.md

@@ -71,13 +71,13 @@ To test your templates, commands, and other changes locally, follow these steps:
 
    Run the following command to generate the local packages:
 
-   ```
+   ```bash
    ./.github/workflows/scripts/create-release-packages.sh v1.0.0
    ```
 
 2. **Copy the relevant package to your test project**
 
-   ```
+   ```bash
    cp -r .genreleases/sdd-copilot-package-sh/. <path-to-test-project>/
    ```