Mark scheduler mocking as TODO

Author: eps1lon

tests/setup-env.js

@@ -1,3 +1,4 @@
 import '@testing-library/jest-dom/extend-expect'
+// TODO: Can be removed in a future React release: https://github.com/reactwg/react-18/discussions/23#discussioncomment-798952
 // eslint-disable-next-line import/no-extraneous-dependencies -- need the version from React not an explicitly declared one
 jest.mock('scheduler', () => require('scheduler/unstable_mock'))