Update schedule to 1.2.2 (#17462)
Closes #17455
Summary of the issue:
NVDA is using schedule 1.2.1.
Description of user facing changes:
None
Description of development approach:
Update schedule to 1.2.2 and perform compilation/testing.
Testing strategy:
Manual testing (with unit tests): make sure schedule functions are working after upgrading the dependency.
Known issues with pull request:
None
