Merge pull request #7856 from jdfreder/missing

Update examples/widgets/index notebook

examples/Interactive Widgets/Index.ipynb

@@ -42,7 +42,7 b''
     "- [Using Interact](Using Interact.ipynb)\n",
     "- [Widget Basics](Widget Basics.ipynb)  \n",
     "- [Widget Events](Widget Events.ipynb)  \n",
-    "- [Widget Placement](Widget Placement.ipynb)  \n",
+    "- [Widget List](Widget List.ipynb)  \n",
     "- [Widget Styling](Widget Styling.ipynb)    \n",
     "- [Custom Widget](Custom Widget - Hello World.ipynb)"
    ]