Merge branch 'JoeMurray-master-patch-56733' into 'master'

Remove D8 as a possible requirement since no longer supported

See merge request !41

docs/drupal8/index.md

 ???+ tldr "About this document"
 
+    CiviCRM follows the Drupal community's decisions around which versions of Drupal receive support. Drupal 8 is no longer supported, but Drupal 7 and Drupal 9 are supported. Drupal 10's release date is targetted for August 2022 (as of April 2022), and the CiviCRM community anticipate providing support for it around the time of its release.
+    
     This guide covers standard installation of CiviCRM on an existing Drupal 8 or 9 site. It assumes that you previously completed these tasks:
 
     1. [Install Drupal 8 or 9](https://www.drupal.org/docs/8/install), and...

docs/general/requirements.md

@@ -43,7 +43,7 @@ See the page on [choosing a CMS](../planning/cms.md) for more information about
 
 ### Drupal
 
-* [Drupal 8/9](../drupal8/index.md)
+* [Drupal 9](../drupal9/index.md)
 
 * [Drupal 7](../drupal7/index.md)