chore(flux): update image renovate 1.25.1 → 1.26.0 (#34036)

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 | `1.25.1` -> `1.26.0` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMzIuNCIsInVwZGF0ZWRJblZlciI6IjM5LjIzMi40IiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvbWlub3IiXX0=-->

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

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: renovate
-      version: 1.25.1
+      version: 1.26.0
       sourceRef:
         kind: HelmRepository
         name: truecharts