fix: goreleaser brew completions

[caarlos0]

• fixed release to use a Personal Access Token: judging by history/blame, brew upload was disabled because it wasn't working, its likely because you need to use a PAT for it to work, check https://goreleaser.com/ci/actions/#token-permissions for more details
• added completion files to the archives
• installing the completions on the homebrew-tap

this should close go-task/homebrew-tap#2 as well

[andreynering]

Hi @caarlos0,

I think I tried a different Personal Access Token and it still failed. Anyway, let's try again; just added a brand new token.

Thanks!