fixed link again.

Author: Heidilohr

articles/virtual-desktop/virtual-desktop-fall-2019/TOC.yml

@@ -5,7 +5,7 @@
   - name: What is Windows Virtual Desktop?
     href: ../overview.md
   - name: Spring 2020 Release documentation
-    href: ./create-host-pools-azure-marketplace.md
+    href: ../create-host-pools-azure-marketplace.md
 - name: Tutorials
   items:
   - name: 1. Create a tenant