Merge pull request magento-commerce/devdocs#2551

Add a banner to pages that do not accept pull requests

Author: dshevtsov

_config.yml

@@ -115,15 +115,13 @@ defaults:
     values:
       group: module-reference-guide-2_3
       github_link: false
-      feedback_link: false
 
   -
     scope:
       path: guides/v2.4/mrg
     values:
       group: module-reference-guide-2_4
       github_link: false
-      feedback_link: false
 
   -
     scope:

src/_includes/layout/page-header.html

@@ -34,6 +34,12 @@
   </div>
   {% endif %}
 
+  {% unless page.github_link %}
+  <div class="message-banner">
+    This topic is generated and maintained through automation, so we do not accept direct contributions from pull requests on GitHub.
+  </div>
+  {% endunless %}
+
   {% if page.url contains "guides/v2.3/" %}
   <div class="bs-callout-warning">
     PHP 7.3 reaches end of support in December 2021 and {{site.data.var.ee}} 2.3.x reaches end of support in April 2022. You may want to consider planning your upgrade now to {{site.data.var.ee}} 2.4.x and PHP 7.4.x to help maintain PCI compliance.