Issue #3176913 by sarvjeetsingh, mherchel: [Olivero Code Review] Missing @file...

Issue #3176913 by sarvjeetsingh, mherchel: [Olivero Code Review] Missing @file documentation in block--system-powered-by-block.html.twig

core/themes/olivero/templates/block/block--system-powered-by-block.html.twig

 {% extends "block.html.twig" %}
-
+{#
+/**
+ * @file
+ * Olivero's theme implementation for Powered by Drupal block.
+ *
+ * The Powered by Drupal block is an optional link to the home page of the
+ * Drupal project.
+ *
+ */
+#}
 {% block content %}
   {{ attach_library('olivero/powered-by-block') }}
   <span>