Missed a bit when it came to #362

Author: jakearchibald

fetch.bs

@@ -2917,7 +2917,7 @@ optional <i>CORS flag</i> and <i>CORS-preflight flag</i>, run these steps:
    <li>
     <p>If <var>request</var>'s <a for=request>redirect mode</a> is
     "<code>follow</code>", then set <var>request</var>'s <a>service-workers mode</a> to
-    "<code>none</code>".
+    "<code>foreign</code>".
 
     <p class="note no-backref">Redirects coming from the network (as opposed to from a service
     worker) are not to be exposed to a service worker.