Update license

[chadwhitacre]

Looks like we didn't get this one updated w/ the final language.

cf.:

• https://github.com/codecov/gazebo/blob/main/LICENSE
• https://github.com/codecov/worker/blob/main/LICENSE
• https://github.com/codecov/shared/blob/main/LICENSE
• https://github.com/codecov/codecov-api/blob/main/LICENSE