Update specs/WindowControlsOverlayConfiguration.md

Co-authored-by: David Risney <[email protected]>

specs/WindowControlsOverlayConfiguration.md

@@ -99,7 +99,7 @@ interface ICoreWebView2WindowControlsOverlaySettings : IUnknown {
   /// with any elements directly below it, so you should avoid placing content there. 
   /// To that end, there are four CSS environment vairables defined to help you 
   /// get the dimensions of the available titlebar area to the left of the overlay.
-  /// Similarly the navigator object wil contain a  WindowControlsOverlay property
+  /// Similarly the navigator object wil contain a [WindowControlsOverlay property](https://developer.mozilla.org/en-US/docs/Web/API/WindowControlsOverlay)
   /// which can be used to get the titlebar area as a rect, and listen for changes
   /// to the size of that area.
   ///