fix(github-release): update rancher/system-upgrade-controller to v0.13.3

| datasource  | package                           | from    | to      |
| ----------- | --------------------------------- | ------- | ------- |
| github-tags | rancher/system-upgrade-controller | v0.13.2 | v0.13.3 |

cluster/apps/system-upgrade/system-upgrade-controller/kustomization.yaml

@@ -2,7 +2,7 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
-  - github.com/rancher/system-upgrade-controller?ref=v0.13.2
+  - github.com/rancher/system-upgrade-controller?ref=v0.13.3
   - plans
 images:
   - name: rancher/system-upgrade-controller