Fix scaladoc for ReadableStreamReader.cancel overloads.

dom/src/main/scala/org/scalajs/dom/ReadableStreamUnderlyingSource.scala

@@ -34,13 +34,11 @@ trait ReadableStreamUnderlyingSource[T] extends js.Object {
  var pull: js.UndefOr[js.Function1[ReadableStreamController[T], Unit | js.Promise[Unit]]] = js.undefined
 
  /** A function that is called whenever the consumer cancels the stream, via [[ReadableStream.cancel]] or
- * [[ReadableStreamReader.cancel]]. It takes as its argument the same value as was passed to those methods by the
- * consumer.
- *
- * If the shutdown process is asynchronous, it can return a promise to signal success or failure; the result will be
- * communicated via the return value of the [[cancel]] method that was called. Additionally, a rejected promise will
- * error the stream, instead of letting it close. Throwing an exception is treated the same as returning a rejected
- * promise.
+ * [[ReadableStreamReader.cancel():scala\.scalajs\.js\.Promise[Unit]*]]. It takes as its argument the same value as
+ * was passed to those methods by the consumer. If the shutdown process is asynchronous, it can return a promise to
+ * signal success or failure; the result will be communicated via the return value of the [[cancel]] method that was
+ * called. Additionally, a rejected promise will error the stream, instead of letting it close. Throwing an exception
+ * is treated the same as returning a rejected promise.
  */
  var cancel: js.UndefOr[js.Function1[js.Any, Unit | js.Promise[Unit]]] = js.undefined