External Version bump for archlinux new version string "2021.04.01"

roles/netbootxyz/defaults/main.yml

@@ -142,8 +142,8 @@ releases:
     mirror: mirrors.evowise.com
     name: Arch Linux
     versions:
-    - code_name: 2021.03.01
-      name: 2021.03.01
+    - code_name: 2021.04.01
+      name: 2021.04.01
   blackarch:
     enabled: true
     menu: linux