Merge pull request #2539 from MicrosoftDocs/drewbat/updating-toast-overview-link

Update index.md

Author: drewbatgit

hub/apps/design/shell/index.md

@@ -12,7 +12,7 @@ Learn how to use tiles, badges, toasts, and notifications to provide entry point
 
 :::row:::
     :::column:::
-### [Toast notifications](tiles-and-notifications/toast-ux-guidance.md)
+### [Toast notifications](tiles-and-notifications/toast-notifications-overview.md)
 Adaptive and interactive toast notifications let you create flexible notifications with text, images, and buttons/inputs.
     :::column-end:::
     :::column:::
@@ -41,4 +41,4 @@ Extend your app content into the title bar and add custom content.
 ### [Start menu icon](tiles-and-notifications/creating-tiles.md)
 Every app is represented in the Start Menu by an icon. You can also pin secondary icons to provide direct access to specific content.
     :::column-end:::
-:::row-end:::
+:::row-end:::