Increase file upload validation limits

- EntregaController: max:2048 -> max:20480 (2MB -> 20MB)
- UpdateUserProfileInformation: max:1024 -> max:5120 (1MB -> 5MB)

The server-level limits (nginx client_max_body_size and php.ini) were
already raised in the previous commit; these Laravel validation rules
were the remaining bottleneck blocking uploads over 2MB.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Actions/Fortify/UpdateUserProfileInformation.php

@@ -22,7 +22,7 @@ class UpdateUserProfileInformation implements UpdatesUserProfileInformation
             'apellidoPaterno' => ['nullable', 'string', 'max:255'],
             'apellidoMaterno' => ['nullable', 'string', 'max:255'],
             'email' => ['required', 'email', 'max:255', Rule::unique('users')->ignore($user->id)],
-            'photo' => ['nullable', 'mimes:jpg,jpeg,png', 'max:1024'],
+            'photo' => ['nullable', 'mimes:jpg,jpeg,png', 'max:5120'],
         ])->validateWithBag('updateProfileInformation');
 
         if (isset($input['photo'])) {