Fix export tutorial

[angelayi]

Fixes #3773

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3777

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❌ 3 New Failures

As of commit f1f17f1 with merge base a18358d ():

NEW FAILURES - The following jobs have failed:

• Build tutorials (nightly/test) / build / pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• Build tutorials / build / pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• link check on PR / linkChecker (gh)
  Process completed with exit code 1.

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