Schedule API shouldn't require date

[blahblablee]

Currently if you try to access the schedule api like this

https://statsapi.mlb.com/api/v1/schedule?gamePk=831508

by using

>>> mlb = mlbstatsapi.Mlb()
>>> games = mlb.get_scheduled_games_by_date(gamePks=831508)

you'll get back a None

If you include the date

>>> mlb = mlbstatsapi.Mlb()
>>> games = mlb.get_scheduled_games_by_date(date="2026-03-14", gamePks=831508)

you'll get back the correct games object.

I was testing an application using the library and have a few other data validation issues I'm going to open a pull request for when I have time to run the tests properly, but this one I'm not sure what the correct change would be.