Update 'Project Setup Guide for Project: Serenity'

Project-Setup-Guide-for-Project%3A-Serenity.md

@@ -25,6 +25,7 @@ Make sure the following **workloads** are installed in **Visual Studio**:
 2. Click **Tools** at the top, and then **Get Tools & Features**.
 3. Select the workloads above.
 4. Click **Modify** to apply.
+5. Once everything is installed, **close** Visual Studio.
 
 # Connecting to Gitea via SSH