Update TOC.yml

Author: qpetraroia

articles/aks/TOC.yml

@@ -181,7 +181,7 @@
           href: upgrade-cluster.md
         - name: Use Uptime SLA
           href: uptime-sla.md
-        - name: Use Draft
+        - name: Use Draft (preview)
           href: draft.md
         - name: Use proximity placement groups
           href: reduce-latency-ppg.md