Corrected sentence in Streams API overview (mdn#7712)

files/en-us/web/api/streams_api/index.html

@@ -25,7 +25,7 @@ <h2 id="Concepts_and_usage">Concepts and usage</h2>
 
 <p><img alt="" src="concept.png"></p>
 
-<p>There are more advantages too — you can detect when streams start or end, chain streams together, handle errors and cancel streams as required, and react to the speed of the stream is being read at.</p>
+<p>There are more advantages too — you can detect when streams start or end, chain streams together, handle errors and cancel streams as required, and react to the speed the stream is being read at.</p>
 
 <p>The basic usage of Streams hinges around making responses available as streams. For example, the response body returned by a successful <a href="/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch">fetch request</a> can be exposed as a {{domxref("ReadableStream")}}, and you can then read it using a reader created with {{domxref("ReadableStream.getReader()")}}, cancel it with {{domxref("ReadableStream.cancel()")}}, etc.</p>