fix: system-upgrade-controller renovate comment

bootstrap/templates/addons/system-upgrade-controller/app/kustomization.yaml.j2

@@ -2,7 +2,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
-  # renovate: datasource=docker image=rancher/system-upgrade-controller
+  # renovate: datasource=github-releases depName=rancher/system-upgrade-controller
   - https://github.com/rancher/system-upgrade-controller/releases/download/v0.11.0/crd.yaml
   - https://github.com/rancher/system-upgrade-controller?ref=v0.11.0
 images: