Bump CentOS to 8.5

roles/netbootxyz/defaults/main.yml

@@ -165,8 +165,8 @@ releases:
     mirror: http://mirror.centos.org
     name: CentOS
     versions:
-    - code_name: 8.4.2105
-      name: '8.4'
+    - code_name: 8.5.2111
+      name: '8.5'
     - code_name: 8
       name: 8.x Latest
     - code_name: 8-stream