Two trivial fixes

[jaywonchung]

I was reading the framework just out of interest and found two quick fixes.

Especially, the rationale behind removing strict=True from zip is:

1. It's obvious that both iterables have the same length.
2. strict=True was introduced in zip in Python 3.10, but pyproject.toml specifies requires-python >= 3.8.

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[awgu]

re 2: seems https://github.com/pytorch/torchtitan/issues/62 was closed too early? cc: @tianyu-l we can just get rid of the strict=True though -- I agree it is not too necessary