Wrong values in hetzner ccm quickstart docs for hcloud only clusters

[timkrase]

/kind bug

What steps did you take and what happened:
Tried to install the hetzner ccm in a hcloud only cluster. Since #1415 , the helm command in the docs looks like this:
`helm repo add hcloud https://charts.hetzner.cloud
helm repo update hcloud

KUBECONFIG=$CAPH_WORKER_CLUSTER_KUBECONFIG helm upgrade --install hccm hcloud/hcloud-cloud-controller-manager --version 1.20.0
--namespace kube-system
--set secret.name=hetzner
--set secret.tokenKeyName=hcloud
--set privateNetwork.enabled=false`

Unfortunately, this does not seem to work, as the secret is not correctly initialized. The container therefore fails to be created.
Following Management cluster setup of the docs, the secret is created with the name "hetzner" and key "hcloud". Hetzner ccm expects a secret with name "hcloud" and key "token" though by default (hetzner ccm values.yaml.

I ended up installing ccm with the following helm command: helm upgrade --install hccm hcloud/hcloud-cloud-controller-manager -n kube-system --version 1.20.0 --namespace kube-system --set env.HCLOUD_TOKEN.valueFrom.secretKeyRef.name=hetzner --set env.HCLOUD_TOKEN.valueFrom.secretKeyRef.key=hcloud

It was just a quick test from my side, I don't know how/if the private network value needs to be adjusted too.

[guettli]

I am reproducing it, and can confirm:

❯ kubectl get events  --sort-by='.lastTimestamp' -A| grep -v Normal

kube-system 65s Warning   Failed   pod/hcloud-cloud-controller-manager-.. Error: secret "hcloud" not found