fix: broken args, up is a separate arg

[benoitf]

while testing this extension in Podman Desktop and the support of Docker Desktop extensions, there was an error reported on my side.

I figured out that it's because the arguments are not separated.

I guess Docker Desktop is sending the call through a CLI call so space don't matters but if we send using REST API, 'tailscale up' should be split into two args, 'tailscale' and 'up'

[benoitf]

@rosszurowski is that this extension is still maintained ? if so I would love to have this fix being merged

[benoitf]

thank you @rosszurowski 🚀