Merge pull request #8537 from kenjis/docs-uploaded_files-validate

docs: use validateData() instead of validate() in uploaded_files

user_guide_src/source/libraries/uploaded_files/002.php

@@ -27,7 +27,7 @@ public function upload()
                 ],
             ],
         ];
-        if (! $this->validate($validationRule)) {
+        if (! $this->validateData([], $validationRule)) {
             $data = ['errors' => $this->validator->getErrors()];
 
             return view('upload_form', $data);