DOC Fixes unpacking issue in dynamo explain docs (#101761)
This PR updates the docs to be consistent with `torch.explain` which currently returns 6 items:
https://github.com/pytorch/pytorch/blob/bfb3941ad8aaf0af159c2bec3cf1cbec1488f335/torch/_dynamo/eval_frame.py#L622-L629
Pull Request resolved: https://github.com/pytorch/pytorch/pull/101761
Approved by: https://github.com/desertfire
