Update dependency fluxcd/flux2 to v2.7.2

Author: renovate[bot]

clusters/common/bootstrap/flux/kustomization.yaml

@@ -4,7 +4,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
-  - github.com/fluxcd/flux2/manifests/install?ref=v2.6.4
+  - github.com/fluxcd/flux2/manifests/install?ref=v2.7.2
   - ./secret.yaml
 patches:
   # Remove the default network policies