CI fails on every release

[nilfm]

https://github.com/Netflix/vmaf/actions/runs/7133167143/job/19425266007

The upload_url seems wrongly templated:

upload_url: [https://uploads.github.com/repos/Netflix/vmaf/releases/133078881/assets{?name,label}](https://uploads.github.com/repos/Netflix/vmaf/releases/133078881/assets%7B?name,label})

cc @kylophone if you know what is causing this, otherwise I'll investigate with low priority. Binaries are still being uploaded correctly, see here. Not sure if there's any impact at all.

[kylophone]

Oh, I think I know this one from awhile back. We have multiple jobs trying to upload a file with the same name, i.e. the MacOS / Linux vmaf binaries.

[nilfm]

I see! From past releases I see we only release a single binary for Mac and Linux combined, and another one for Windows. I guess we could just add an if statement there so that it only uploads on a single job.