Update 04-face-service.md

Instructions/Exercises/04-face-service.md

@@ -264,7 +264,7 @@ Now you're ready to use the SDK to call the Vision service and detect faces in a
 
 While the **Azure AI Vision** service offers basic face detection (along with many other image analysis capabilities), the **Face** service provides more comprehensive functionality for facial analysis and recognition.
 
-1. In Visual Studio Code, in the **Explorer** pane, browse to the **19-face** folder and expand the **C-Sharp** or **Python** folder depending on your language preference.
+1. In Visual Studio Code, in the **Explorer** pane, browse to the **04-face** folder and expand the **C-Sharp** or **Python** folder depending on your language preference.
 2. Right-click the **face-api** folder and open an integrated terminal. Then install the Face SDK package by running the appropriate command for your language preference:
 
     **C#**