Fix homebrew release script

I thought we fixed this but apparently it can't find the version so the script failed with the 4.0.1 release

https://github.com/coder/code-server/runs/4719644203?check_suite_focus=true

I think the best thing to do is recreate a very basic repo and get it working there and then update it in code-server. 

Third try is a charm they say!