Path update for Karma debug runner

docs/en_us/internal/testing.rst

@@ -341,8 +341,7 @@ To run JavaScript tests in a browser, run these commands.
 To debug these tests on devstack in a local browser:
 
  * first run the appropriate test_js_dev command from above which will open a browser using XQuartz
- * open the same URL in your browser but change the IP address to 192.168.33.10, e.g.
-    http://192.168.33.10:TEST_PORT/suite/cms
+ * open http://192.168.33.10:9876/debug.html in your host system's browser of choice
  * this will run all the tests and show you the results including details of any failures
  * you can click on an individually failing test and/or suite to re-run it by itself
  * you can now use the browser's developer tools to debug as you would any other JavaScript code