Bump optimum-executorch pin to include PR #208

[larryliu0820]

Bumping the pin to optimum-executorch to include huggingface/optimum-executorch#208.

This fixes whisper metal CI jobs such as https://github.com/pytorch/executorch/actions/runs/21416571328/job/61668433882

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16927

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• [ROCm][CI] Migration to another CSP

❌ 8 New Failures, 1 Unrelated Failure

As of commit 64bf616 with merge base e748286 ():

NEW FAILURES - The following jobs have failed:

• pull / unittest-buck / linux / linux-job (gh)
  RuntimeError: Command docker exec -t f43fb71c5ac8e7896ef33f5125bc8d9627d0b0d5454a62c2eeb0a169ba6efc3c /exec failed with exit code 3
• Test CUDA Builds / export-model-cuda-artifact (google, gemma-3-4b-it, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t f5144d22de81997484132f7ca8a07b2cb136b48ecae436b92db5483fbe12fd8c /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-small, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 972d44b6260769df35b89d7af6a21d21904825afcea241d72c01754c33b5c118 /exec failed with exit code 1
• Test CUDA Windows Export / export-model-cuda-windows-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t dd96fac1388f91b733aadfdffcfb09d4d3f819f3a10b4a9b2db2c3cfcb7fc084 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_model_smollm2-135M) / linux-job (gh)
  RuntimeError: Command docker exec -t 0e1bc55771488625504edcf10df1702219c8ec203200a59cd6bb60062db043fb /exec failed with exit code 2
• trunk / test-huggingface-transformers-macos (bert|coreml_fp32_gpu|--quantize) / macos-job (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1
• trunk / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh)
  RuntimeError: Command docker exec -t 589eff0ef4c96a2bcd1f04745e09af122debc7ad81388218776d953671a23468 /exec failed with exit code 1
• trunk / test-qnn-optimum-model (fp32, distilbert) / linux-job (gh)
  RuntimeError: Command docker exec -t 0658893e792196d950342884166623f0aba0525b079d8f5b3085c3e366cb2e6c /exec failed with exit code 1

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest-buck / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 3

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[Gasoonjia]

stamp for unblock. Plz make sure ci is healthy before merging