Added a missing __construct doc comment.

(But why is phpcs complaining about this now and it wasn't before??)

plugins/woocommerce/tests/php/src/Internal/DependencyManagement/ExampleClasses/ClassWithDependencies.php

@@ -36,6 +36,9 @@ class ClassWithDependencies {
 	 */
 	public $dependency_class = null;
 
+	/**
+	 * Creates a new instance of the class.
+	 */
 	public function __construct() {
 		self::$instances_count++;
 	}