Add missing brackets to Fly configuration

[szepeviktor]

Seems like they were missing. @kentcdodds

[kentcdodds]

Thanks for this @szepeviktor. I don't understand TOML syntax, so you could be right. However, the Fly docs have it the same way I do: https://fly.io/docs/reference/configuration/#services-concurrency

Have you tested your change in any way?

[szepeviktor]

No.

Those docs may be incorrect. Let us see! https://github.com/superfly/docs/pull/783

[szepeviktor]

We are in TOML World :) Please see https://github.com/superfly/docs/pull/783#issuecomment-1572794983

[kentcdodds]

TOML is super confusing. 😆