fix(validateEmail): redirect to home if no token provided

[wescopeland]

Fixes this error adding noise to the logs:

The token field is required. (View: /home/forge/retroachievements.org/releases/2024-06-30T112700-6.7.1-76e5a495/resources/views/pages-legacy/validateEmail.blade.php) {"userId":117089,"exception":"[object] (Illuminate\View\ViewException(code: 0): The token field is required. (View: /home/forge/retroachievements.org/releases/2024-06-30T112700-6.7.1-76e5a495/resources/views/pages-legacy/validateEmail.blade.php) at /home/forge/retroachievements.org/releases/2024-06-30T112700-6.7.1-76e5a495/vendor/laravel/framework/src/Illuminate/Support/helpers.php:330)