Fixes spelling in Authentication Pest Test (laravel#932)

Changes:

From
- 'users can not authenticate with invalid_password'

To
- 'users cannot authenticate with invalid password'

Author: mohammedyh

stubs/pest-tests/AuthenticationTest.php

@@ -21,7 +21,7 @@
     $response->assertRedirect(RouteServiceProvider::HOME);
 });
 
-test('users can not authenticate with invalid_password', function () {
+test('users cannot authenticate with invalid password', function () {
     $user = User::factory()->create();
 
     $this->post('/login', [