Update toc.yml

Author: j-martens

articles/machine-learning/toc.yml

@@ -91,7 +91,7 @@
   items: 
     - name: Plan and manage costs
       href: concept-plan-manage-cost.md
-    - name: Designer (drag-n-drop ML)"
+    - name: Designer (drag-n-drop ML)
       displayName: studio
       href: concept-designer.md
       - name: Algorithm cheat sheet