Update cloudflared Docker tag to v1.18.0 (#847)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [cloudflared](https://github.com/cloudflare/cloudflared) | minor | `1.17.3` -> `1.18.0` |

---

### Configuration

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

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, 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://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4xLjMiLCJ1cGRhdGVkSW5WZXIiOiI0MS4xLjMiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbImltYWdlIl19-->

Reviewed-on: #847
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/applications/code-server/Chart.yaml

@@ -23,6 +23,6 @@ dependencies:
   - name: cloudflared
     alias: cloudflared
     repository: oci://harbor.alexlebens.net/helm-charts
-    version: 1.17.3
+    version: 1.18.0
 icon: https://cdn.jsdelivr.net/gh/selfhst/icons/png/visual-studio-code.png
 appVersion: 4.100.2