update Header.j2.md

Author: sinaatalay

src/markdown/Header.j2.md

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-<!-- Remove below in markdown/Header.j2.md not in README.md -->
+<!-- Remove below in src/markdown/Header.j2.md not in README.md -->
 
 # RenderCV Pipeline
 
@@ -23,8 +23,9 @@ Picture this:
 
 1.  Learn more about [RenderCV](https://github.com/sinaatalay/rendercv) to understand what you can do with this tool.
 2.  Edit and preview your CV in your browser without installing anything by creating a codespace. Click the <> **Code** button, then click the **Codespaces** tab, and then click **Create codespace on main**. The environment will be ready for RenderCV usage.
+3.  Update `.vscode/launch.json` to point to your YAML file and press `F5` to run RenderCV in the browser.
 
-<!-- Remove above in markdown/Header.j2.md not in README.md -->
+<!-- Remove above in src/markdown/Header.j2.md not in README.md -->
 # <<cv.name>>'s CV
 
 ((* if cv.phone *))