Revert recent changes for window location updates

There are a few other things at play that will require more investigation at a future date:

- Why window.location.assign() or history.pushState() do not work
- If any other config or polyfills are needed with JSDOM

Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>

tests/javascripts/jest.config.js

@@ -12,6 +12,6 @@ module.exports = {
   setupFiles: ['./support/setup.js'],
   testEnvironment: 'jsdom',
   testEnvironmentOptions: {
-    url: 'https://www.notifications.service.gov.uk',
+    url: 'https://beta.notify.gov',
   },
 };