Update tokenizer pin

[mergennachin]

Summary:

Bring in this fix:

meta-pytorch/tokenizers@92cf202

Test Plan:

Reviewers:

Subscribers:

Tasks:

Tags:

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16197

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❌ 6 New Failures, 2 Unrelated Failures

As of commit 104cd28 with merge base 6cca6e6 ():

NEW FAILURES - The following jobs have failed:

• Copilot code review / Agent (gh)
  Process completed with exit code 1.
• pull / test-lora-linux / linux-job (gh)
  RuntimeError: Command docker exec -t a77008793cf8b80cad73a666c98b12285e3b672676f4f63221cee3a01bc8a1bf /exec failed with exit code 127
• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
  RuntimeError: Command docker exec -t 9aa98c24e20b5effb6441f64c2f82b055aea03e1d221023aba4a82c2e4512b54 /exec failed with exit code 1
• pull / unittest-buck / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 4927d4ef554baa42e32c0c5e879de3c19b9d7d34b07fb5738dbe56165efb12e6 /exec failed with exit code 3
• pull / unittest-buck / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 3
• Test Metal Backend / export-model-metal-artifact (openai, whisper-small, non-quantized) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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

• Test CUDA Builds / export-model-cuda-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-tile-packed) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

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[Copilot]

Pull request overview

This PR updates the tokenizers submodule to incorporate a specific bug fix from the upstream repository.

• Updates the tokenizers submodule commit hash to bring in commit 92cf202d5f470f641a3dc516676066d4129eb6e8

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