fix types in fix_wagon_depot

[ypypy28]

Change types of the parameters in the fix_wagon_depot function from list[tuple] to list[list[tuple]] according to the instructions

Implement a function called fix_wagon_depot() that accepts a list of three items. Each list item is a sublist (or "row") that contains three tuples. Each tuple is a (<wagon ID>, <wagon color>) pair.

Before fix:

    :param wagons_rows: list[tuple] - the list of rows of wagons.
    :return: list[tuple] - list of rows of wagons.

After fix:

    :param wagons_rows: list[list[tuple]] - the list of rows of wagons.
    :return: list[list[tuple]] - list of rows of wagons.

[BethanyG]

Hello @ypypy28 👋🏽

Thanks for opening this PR on Exercism.

We are currently in a phase of our journey where we have paused community contributions to allow us to take a breather and redesign our community model.

You can learn more in this blog post. As such, all issues and PRs in this repository are being automatically closed.

❗ That doesn’t mean we’re not interested in your ideas, or that if you’re stuck on something we don’t want to help. The best place to discuss things is with our community on the Exercism Community Forum. You can use this link to copy this PR into a new topic there.

Note: If this PR has been pre-approved, please link back to it on the forum thread and a maintainer or staff member will reopen it.