docs: pin download link to latest version (#1073)

This way we don't risk users downloading outdated versions

Author: phm07

docs/tutorials/setup-hcloud-cli.md

@@ -18,7 +18,7 @@ Install them by extracting the archive and moving the binary to a directory in y
 On a 64-bit Linux system, it could look something like this:
 
 ```bash
-curl -sSLO https://github.com/hetznercloud/cli/releases/download/v1.51.0/hcloud-linux-amd64.tar.gz
+curl -sSLO https://github.com/hetznercloud/cli/releases/latest/download/hcloud-linux-amd64.tar.gz
 sudo tar -C /usr/local/bin --no-same-owner -xzf hcloud-linux-amd64.tar.gz hcloud
 rm hcloud-linux-amd64.tar.gz
 ```