Convert raw docXML to typedoc/jsdoc comment (Dialog.onDialogEvent method)

[JonathanFingold]

Versions

What package version of the SDK are you using. master
What nodejs version are you using n/a
What browser version are you using n/a
What os are you using Windows

Describe the bug

C# doxXML comments have not been converted to typedoc/jsdoc comments.

To Reproduce

Steps to reproduce the behavior:

1. Look at the code for Dialog.onDialogEvent:

   botbuilder-js/libraries/botbuilder-dialogs/src/dialog.ts

   Lines 483 to 489 in 63e9651

   	/// <summary>
   	/// Called when an event has been raised, using `DialogContext.emitEvent()`, by either the current dialog or a dialog that the current dialog started.
   	/// </summary>
   	/// <param name="dc">The dialog context for the current turn of conversation.</param>
   	/// <param name="e">The event being raised.</param>
   	/// <param name="cancellationToken">The cancellation token.</param>
   	/// <returns>True if the event is handled by the current dialog and bubbling should stop.</returns>

2. See error.

Expected behavior

Use jsdoc/typedoc comments to document the code.

[bug]