Update torch_export_challenges_solutions.rst

[svekars]

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As of commit 3e8a6c575b4d62323a7e602cb877dafbc61612e2 with merge base b6b5c2115180d0a8eae1e0ddcfe62441c6763c8f (): :green_heart: Looks good so far! There are no failures yet. :green_heart:

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