Adust naming slightly (#6347)

Author: GrantMeStrength

hub/apps/introduction.md

@@ -8,7 +8,7 @@ ms.localizationpriority: medium
 ms.collection: windows11
 ---
 
-# Welcome to Windows app development
+# The essentials of Windows app development
 
 :::image type="content" source="images/essentials-header.png" alt-text="Windows logo with app icons floating in the background" border="false":::
 

hub/apps/toc.yml

@@ -2,7 +2,7 @@ items:
 - name: Build Windows apps
   href: desktop/index.yml
   items:
-  - name: Introduction
+  - name: Essentials
     href: introduction.md
   - name: Core concepts
     expanded: true