Fix match generation detecting file close on Windows

[NicholasBottone]

https://github.com/SecondRobotics/SimTourneyBot/blob/main/src/commands/generate_schedule.ts#L86
This promise never resolves on Windows.

[BrennanB]

Fixed by ab66bee I believe.

[NicholasBottone]

Need to test to confirm, staff said that it didn't work as expected