fix(flux-system): Fix override syntax

infrastructure/flux-system/monitoring.yaml

@@ -9,7 +9,6 @@ spec:
   ref:
     tag: v0.39.0
   url: https://git.shivering-isles.com/github-mirror/fluxcd/flux2
-  targetNamespace: monitoring-system
   ignore: |
     # exclude all
     /*
@@ -25,6 +24,7 @@ spec:
   interval: 1h0m0s
   path: ./manifests/monitoring/monitoring-config
   prune: true
+  targetNamespace: monitoring-system
   sourceRef:
     kind: GitRepository
     name: monitoring