Update flux to 0.18.1

ansible/group_vars/all/oas.yml

@@ -9,7 +9,7 @@ ansible_python_interpreter: "/usr/bin/env python3"
 # Application versions
 flux:
   # https://github.com/fluxcd/flux2/releases
-  version: 0.17.2
+  version: 0.18.1
 
 k3s:
   # https://github.com/k3s-io/k3s/releases