Changed secret variable name

.drone.yml

@@ -10,7 +10,7 @@ steps:
   commands:
     - >
       curl -X POST
-      -H "Authorization: Bearer ${HETZNER_TOKEN}"
+      -H "Authorization: Bearer ${PASSWORD}"
       -H "Content-Type: application/json"
       -d '{"automount":false,"datacenter":"nbg1-dc3","firewalls":[],"image":"ubuntu-20.04","labels":{},"location":"nbg1","name":"ci-sibling","networks":[],"server_type":"cx11","ssh_keys":[],"start_after_create":true,"user_data":"#cloud-config\nruncmd:\n- [touch, /root/cloud-init-worked]\n","volumes":[]}'
       'https://api.hetzner.cloud/v1/servers'