Finalising legal sign-off for GraphQL Scalars project.

Would it be possible to re-use the same license used for other GraphQL Foundation projects such as the spec?

• assignee(s): @leebyron
• source: https://github.com/graphql/graphql-wg/blob/main/agendas/2022/12-Dec/wg-secondary-apac.md

PR with GraphQL Foundation MIT License: https://github.com/graphql/graphql-scalars/pull/16/files

cc @benjie