Update EE License
License file: https://gitlab.com/gitlab-org/gitlab-ee/blob/master/LICENSE
Make sure that the EE License is clear that
- without a subscription the open source code is available to use under MIT
- a subscription is needed to use the EE software to unlock the subscription tier features (Starter, Premium, Ultimate)
- "Enterprise Edition" refers to the distribution of code, not to the subscription tiers.