External Version bump for archlinux new version string "2025.09.01"

Author: netboot-ci

roles/netbootxyz/defaults/main.yml

@@ -168,8 +168,8 @@ releases:
     mirror: mirrors.kernel.org
     name: Arch Linux
     versions:
-    - code_name: 2025.08.01
-      name: 2025.08.01
+    - code_name: 2025.09.01
+      name: 2025.09.01
   blackarch:
     enabled: true
     menu: linux