Update flag default for project
Update a flag default. Updating a flag default uses a [JSON patch](https://datatracker.ietf.org/doc/html/rfc6902) or [JSON merge patch](https://datatracker.ietf.org/doc/html/rfc7386) representation of the desired changes. To learn more, read [Updates](https://launchdarkly.com/docs/api#updates).