Update versions/1.0.0.md

Co-authored-by: Henry Andrews <[email protected]>

versions/1.0.0.md

@@ -73,7 +73,7 @@ The list of actions MUST be applied in sequential order to ensure a consistent o
 
 The `extends` property can be used to indicate that the Overlay was designed to update a specific [[OpenAPI]] document. Where no `extends` is provided it is the responsibility of tooling to apply the Overlay document to the appropriate OpenAPI document(s).
 
-In the following example the `extends` property specifies that the overlay is designed to update the OpenAPI Tic Tac Toe example document, identified by an absolute URI reference.
+In the following example the `extends` property specifies that the overlay is designed to update the OpenAPI Tic Tac Toe example document, identified by an absolute URI.
 
 ```yaml
 overlay: 1.0.0