test(frame): correct terminology in URL fragment test (#6416)

Bug: #6398

test/assets/frames/one-frame-url-fragment.html

@@ -1 +1 @@
-<iframe src='./frame.html&test=fragment'></iframe>
+<iframe src='./frame.html?param=value#fragment'></iframe>

test/frame.spec.ts

@@ -263,7 +263,7 @@ describe('Frame specs', function () {
 
       expect(page.frames().length).toBe(2);
       expect(page.frames()[1].url()).toBe(
-        server.PREFIX + '/frames/frame.html&test=fragment'
+        server.PREFIX + '/frames/frame.html?param=value#fragment'
       );
     });
   });