Issue #3315783 by TravisCarden: Remove reference to Drupal 9 from Composer project templates

composer/Template/LegacyProject/composer.json

 {
     "name": "drupal/legacy-project",
-    "description": "Project template for Drupal 9 projects with composer following drupal/drupal layout",
+    "description": "Project template for Drupal projects with composer following drupal/drupal layout",
     "type": "project",
     "license": "GPL-2.0-or-later",
     "homepage": "https://www.drupal.org/project/drupal",

composer/Template/RecommendedProject/composer.json

 {
     "name": "drupal/recommended-project",
-    "description": "Project template for Drupal 9 projects with a relocated document root",
+    "description": "Project template for Drupal projects with a relocated document root",
     "type": "project",
     "license": "GPL-2.0-or-later",
     "homepage": "https://www.drupal.org/project/drupal",