feat: added mismatch information for python's zstandard

[inosmeet]

Here, I've added the vendor mismatch information for python's zstandard under pypi namespace.
Should be merged after #4236.

[terriko]

This looks like it's just data and I could merge it now so you have it ready for later. Is there a reason it needs to wait until #4236 is merged?

[inosmeet]

Script is triggered when the data/** directory is updated, so if we merge this afterwards, it'll populate the mismatch database.

[terriko]

It's finally merge time!