style(service-worker): fix code formatting in service-worker-getting-started example (#28020)

PR Close #28020

aio/content/examples/service-worker-getting-started/e2e/src/app.e2e-spec.ts

@@ -34,6 +34,7 @@ describe('sw-example App', () => {
         expect(items[3].getText()).toBe('Angular blog');
       });
   });
+
   // Check for a rejected promise as the service worker is not enabled
   it('SwUpdate.checkForUpdate() should return a rejected promise', () => {
     const button = element(by.css('button'));