adjust var name to not override builtin

[regmibijay]

I confirm that this contribution is made under the terms of the license found in the root directory of this repository's source tree and that I have the authority necessary to make this contribution on behalf of its copyright owner.

Currently the code block in provided notebook

if torch.cuda.is_available():
    device = torch.device("cuda")
    type = torch.bfloat16
elif torch.backends.mps.is_available():
    device = torch.device("mps")
    type = torch.float32
else:
    device = torch.device("cpu")
    type = torch.float32

overrides builtin function type. This PR renames the portion to use dtype instead of type to address this issue.

[thomasht86]

As you can see in #979, we renamed this variable in several notebooks. Thanks a lot for reporting. :)

[regmibijay]

thanks for the heads up Thomas. Awesome stuff.