TRY201 wrongly complains about raising from None

[adamtheturtle]

Take the following example:

try:
    raise Exception("We want to hide this error message")
except Exception:
    try:
        raise Exception("We want to show this")
    except Exception as exc:
        raise exc from None

ruff with TRY201 selected tells us:

TRY201 Use `raise` without specifying exception name

However, we cannot do raise from None.

See https://peps.python.org/pep-0409/#proposal for context of this syntax.