feat(github-release): update fluxcd/flux2 to v2.7.2

Author: renovate[bot]

bootstrap/kustomization.yaml

@@ -2,7 +2,7 @@
 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
 patches:
   - patch: |-
       $patch: delete