Update cloudflared Docker tag to v1.20.0 (#1200)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [cloudflared](https://github.com/cloudflare/cloudflared) | minor | `1.19.0` -> `1.20.0` |

---

### 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:eyJjcmVhdGVkSW5WZXIiOiI0MS4zNS4wIiwidXBkYXRlZEluVmVyIjoiNDEuMzUuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiaW1hZ2UiXX0=-->

Reviewed-on: #1200
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/platform/matrix-synapse/Chart.yaml

@@ -45,11 +45,11 @@ dependencies:
   #   version: 4.0.1
   - name: cloudflared
     alias: cloudflared-synapse
-    version: 1.19.0
+    version: 1.20.0
     repository: oci://harbor.alexlebens.net/helm-charts
   - name: cloudflared
     alias: cloudflared-hookshot
-    version: 1.19.0
+    version: 1.20.0
     repository: oci://harbor.alexlebens.net/helm-charts
   - name: postgres-cluster
     alias: postgres-17-cluster