chore(flux): update image renovate 1.17.1 → 1.18.0 (#33092)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [renovate](https://truecharts.org/charts/stable/renovate)
([source](https://redirect.github.com/truecharts/charts/tree/HEAD/charts/stable/renovate))
| minor | `1.17.1` -> `1.18.0` |

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This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

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clusters/main/kubernetes/apps/renovate/app/helm-release.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: renovate
-      version: 1.17.1
+      version: 1.18.0
       sourceRef:
         kind: HelmRepository
         name: truecharts