provide example using external-dns helm chart

[not22day]

Is your feature request related to a problem? Please describe.

at the moment the example is based on plain manifest

Describe the solution you'd like

for me the official external-dns helm chart looks flexible enough to inject the stackit webhook via values https://github.com/kubernetes-sigs/external-dns/blob/master/charts/external-dns/templates/deployment.yaml

Describe alternatives you've considered

-

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• [X] I did search for other open and closed issues before opening this.

Code of Conduct

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Additional context

No response

[not22day]

some promising start..

provider:
      name: webhook
      webhook:
        image:
          repository: ghcr.io/stackitcloud/external-dns-stackit-webhook
          tag: v0.3.1
        args:
        - --project-id=xxx
        env:
        - name: AUTH_TOKEN
          valueFrom:
            secretKeyRef:
              name: external-dns-stackit-webhook
              key: auth-token