docs: add namespace to sample code

kenjis · kenjis · commit a4e5a8a4d375 · 2024-05-08T14:33:54.000+09:00
diff --git a/user_guide_src/source/libraries/files/014.php b/user_guide_src/source/libraries/files/014.php
@@ -1,5 +1,7 @@
 <?php
 
+namespace App;
+
 use CodeIgniter\Files\FileCollection;
 
 class ConfigCollection extends FileCollection
