modified the mkdir command in module 1

Author: Wael Kdouh

docs/aca/01-deploy-api-to-aca/index.md

@@ -10,7 +10,7 @@ In this module, we will start by creating the first microservice named `ACA Web
 ### 1. Create the backend API project (Web API)
 - Open a command-line terminal and create a folder for your project. Use the `code` command to launch Visual Studio Code from that directory as shown:
     ```shell
-    mkdir TasksTracker.ContainerApps
+    mkdir ~/TasksTracker.ContainerApps
     cd TasksTracker.ContainerApps
     code .
     ```