Add documentation for pytorch_tokenizer missing

[mergennachin]

No description provided.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/13256

• 📄 Preview Python docs built from this PR

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❌ 2 New Failures, 1 Unrelated Failure

As of commit ae32df1 with merge base de24489 ():

NEW FAILURES - The following jobs have failed:

• pull / test-mediatek-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t b4f41f58ef57b8f4a2225d8c248203f8c4eec3a469e084405dd6fb79a501c6cf /exec failed with exit code 2
• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  RuntimeError: Command docker exec -t 9f6ff478014854afb8872cb4f88b4c4f70849167b4e59fb9611b9103e9baa96d /exec failed with exit code 1

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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[mergennachin]

Note: merge to main too

[mergennachin]

@pytorchbot cherry-pick --onto main -c docs

[pytorchbot]

Cherry picking #13256

The cherry pick PR is at #13289

Details for Dev Infra team

Raised by workflow job