Fix Import Rule Class in the Documentation

Author: amjadbanimattar

docs/usage/custom-validation-rule.md

@@ -48,7 +48,7 @@ $validator = Validator::make($data, [
 ##### Option 2
 
 ```php
-use Astrotomic\Translatable\Validation\Rules\TranslatableUnique;
+use Illuminate\Validation\Rule;
 ...
 
 $person = new Person(['name' => 'john doe']);
@@ -90,7 +90,7 @@ $validator = Validator::make($data, [
 
 ##### Option 2
 ```php
-use Astrotomic\Translatable\Validation\Rules\TranslatableExists;
+use Illuminate\Validation\Rule;
 ...
 
 $person = new Person(['name' => 'john doe']);

src/Translatable/Locales.php

@@ -20,7 +20,7 @@ class Locales implements Arrayable, ArrayAccess
     protected $config;
 
     /**
-     * @var array<string>
+     * @var array<string,string>
      */
     protected $locales = [];