fix: do not attempt to mount volume as user

hetzner-cloud/cloud-config.yaml.tftpl

@@ -36,7 +36,7 @@ mounts:
       "${volume_path}",
       "/home/${username}",
       ext4,
-      "mode=0755,uid=1000,discard,rw,suid,exec,auto,async",
+      "discard,rw,suid,exec,auto,async",
     ]
 write_files:
   - path: /opt/coder/init
@@ -80,7 +80,6 @@ write_files:
       cert: false
 %{ endif ~}
 runcmd:
-  - dnf update -y
   - chown -R ${username}:${username} /home/${username}
   - systemctl enable coder-agent
   - systemctl start coder-agent