Replace archived yaml module

The yaml module in use today has been [archived](https://github.com/go-yaml/yaml/blob/v3/go.mod). We should switch to the official yaml org maintained fork: https://github.com/yaml/go-yaml

https://github.com/open-feature/cli/blob/b2552286a1d2bdb22640c1e26d7fc7dc2a5640d7/go.mod#L22