Update WINDOWS.md

Added powershell highlighting to updated windows.md

docs/WINDOWS.md

@@ -23,7 +23,11 @@ This guide explains how to download, configure and run Retro AIM Server on Windo
    > While the binaries are 100% safe, you can avoid the security concern by [building the application yourself](./BUILD.md).
    We do not provide signed binaries because of the undue cost and complexity.
 
-   You can alternatively download the file using a Powershell command: `Invoke-WebRequest -Uri "<insert link to version you wish to download here>" -OutFile "retro_aim_server.zip"` and exclude the file or directory from Defender.
+   You can alternatively download the file using a Powershell command:
+   ```powershell
+   Invoke-WebRequest -Uri "<insert link to version you wish to download here>" -OutFile "retro_aim_server.zip"
+   ```
+   and exclude the file or directory from Defender.
    
    Once downloaded, extract the `.zip` archive, which contains the application and a configuration file `settings.bat`.