Inaccessible link in `README.md`

[vitorvasc]

Hi!

I was just reading the Should I create an OFEP section in the project README and noticed there’s a URL that requires you to be a member of a team in the organization.

The URL: https://github.com/orgs/open-feature/teams

[...] please feel free ping someone listed in [sdk-maintainers and cloud-native maintainers](https://github.com/orgs/open-feature/teams) (or) ask in the [CNCF OpenFeature Slack channel](https://cloud-native.slack.com/archives/C0344AANLA1). If you are new, you can create a CNCF Slack account [here](https://slack.cncf.io/).