Update README.md

Author: Igor Chepurnoy

README.md

@@ -112,7 +112,7 @@ return [
     * Create the widget and add the static function. For example:
 
      ```php
-       namespace app\widgets;
+      namespace app\widgets;
 
        use yii\base\Widget;
 
@@ -169,4 +169,4 @@ return [
             ],
         ];
     }
-```
+```