Run tests with docsrs cfg in CI

[kingwingfly]

Objective

The tests should be run both with and without --cfg docsrs.

// no {1}
all_tuples!(
    #[doc(fake_variadic)]
    baz,
    2,
    3,
    T
);

It is needed since only with --cfg docsrs, impl for (T,) should be generated.

#[cfg(docsrs)]
assert_impl_one!(((),): Baz);
#[cfg(not(docsrs))]
assert_not_impl_any!(((),): Baz);

Solution

modified ci.yaml

Testing

I don't know how to test GitHub CI on my machine.