Fix typo.

app/Http/Middleware/VerifyCsrfToken.php

@@ -6,7 +6,7 @@ use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken as BaseVerifier;
 class VerifyCsrfToken extends BaseVerifier
 {
     /**
-     * The URIs that shoudl be excluded from CSRF verification.
+     * The URIs that should be excluded from CSRF verification.
      *
      * @var array
      */