fixed link

Author: anzaman

articles/virtual-wan/TOC.yml

@@ -45,7 +45,7 @@
   - name: Configure Azure AD authentication for User VPN (Preview)
     href: virtual-wan-point-to-site-azure-ad.md
   - name: Configure Multi-application Azure AD authentication for User VPN (Preview)
-    href: virtual-wan-point-to-site-azure-ad-multi-app.md    
+    href: openvpn-azure-ad-tenant-multi-app.md  
   - name: Configure automation (Virtual WAN partners)
     href: virtual-wan-configure-automation-providers.md
   - name: Configure routing