Change team to user for default validator

[niemela]

The problem package format is not only relevant for contests, but can also be used for e.g. education.

Changing "team" to the more generic "user"

[Tagl]

Do you want to update the example problem guess so that its validator uses user instead of author? Or is author fine?

[niemela]

Do you want to update the example problem guess so that its validator uses user instead of author? Or is author fine?

Yes, that's a good idea.

(IMO "author" is one of those terminology choices I really regret 15-20 years later 😄)

[niemela]

Do you want to update the example problem guess so that its validator uses user instead of author? Or is author fine?

Yes, that's a good idea.

But, author is only used in the code, not in any output.... I think this is fine as is.