Update Helm release external-dns to v1.19.0 (#1406)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [external-dns](https://github.com/kubernetes-sigs/external-dns) | minor | `1.18.0` -> `1.19.0` |

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Reviewed-on: #1406
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Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/services/external-dns/Chart.yaml

@@ -16,7 +16,7 @@ maintainers:
 dependencies:
   - name: external-dns
     alias: external-dns-unifi
-    version: 1.18.0
+    version: 1.19.0
     repository: https://kubernetes-sigs.github.io/external-dns/
 icon: https://cdn.jsdelivr.net/gh/selfhst/icons/png/kubernetes.png
 appVersion: 1.16.1