- Update example translations wrapper name to a more descriptive one "_translation_wrapper"

- Make subtitles H4

Author: artemiy-one

README.md

@@ -68,7 +68,7 @@ $post = Post::create($data);
 echo $post->translate('fr')->title; // Mon premier post
 ```
 
-### Filling multiple translations wrapped
+#### Filling multiple translations wrapped
 
 You may define a wrapper property when creating new translations. Set the `translations_wrapper` property in translatable config file:
 ```php

docs/README.md

@@ -57,7 +57,7 @@ $post = Post::create($data);
 echo $post->translate('fr')->title; // Mon premier post
 ```
 
-### Filling multiple translations wrapped
+#### Filling multiple translations wrapped
 
 You may define a wrapper property when creating new translations. Set the `translations_wrapper` property in translatable config file:
 ```php

tests/TranslatableTest.php

@@ -227,11 +227,11 @@ public function it_creates_translations_using_mass_assignment_and_locales(): voi
     #[Test]
     public function it_creates_translations_using_wrapped_mass_assignment_and_locales(): void
     {
-        $this->app->make('config')->set('translatable.translations_wrapper', 'translations');
+        $this->app->make('config')->set('translatable.translations_wrapper', '_translation_wrapper');
 
         $vegetable = Vegetable::create([
             'quantity' => 5,
-            'translations' => [
+            '_translation_wrapper' => [
                 'en' => ['name' => 'Peas'],
                 'fr' => ['name' => 'Pois'],
             ],