docs: fix namespace for UserModel

Author: kenjis

user_guide_src/source/testing/fabricator/003.php

@@ -1,7 +1,8 @@
 <?php
 
+use App\Models\UserModel;
 use CodeIgniter\Test\Fabricator;
 
-$model = new \UserModel($testDbConnection);
+$model = new UserModel($testDbConnection);
 
 $fabricator = new Fabricator($model);

user_guide_src/source/testing/fabricator/004.php

@@ -1,5 +1,6 @@
 <?php
 
+use App\Models\UserModel;
 use CodeIgniter\Test\Fabricator;
 
 $formatters = [
@@ -9,4 +10,4 @@
     'avatar' => 'imageUrl',
 ];
 
-$fabricator = new Fabricator(\UserModel::class, $formatters);
+$fabricator = new Fabricator(UserModel::class, $formatters);

user_guide_src/source/testing/fabricator/007.php

@@ -1,5 +1,6 @@
 <?php
 
+use App\Models\UserModel;
 use CodeIgniter\Test\Fabricator;
 
-$fabricator = new Fabricator(\UserModel::class, null, 'fr_FR');
+$fabricator = new Fabricator(UserModel::class, null, 'fr_FR');