[AzureADDS] Rename article, update TOC

Author: iainfoulds

articles/active-directory-domain-services/TOC.yml

@@ -91,8 +91,8 @@
           href: password-policy.md
         - name: Enable security audit events
           href: security-audit-events.md
-        - name: Integrate Remote Desktop Services and Azure Multi-Factor Authentication
-          href: enable-remote-desktop-network-policy-server.md
+        - name: Secure remote access to VMs
+          href: secure-remote-vm-access.md
     - name: Domain-join VMs
       items:
         - name: Windows Server VM from template