Fix document for forced_align method

[nateanl]

This PR addresses #3747. The lengths of targets and log_probs should be reversed.

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/audio/3748

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✅ You can merge normally! (4 Unrelated Failures)

As of commit 25dd727 with merge base 5286f9f ():

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• Build Linux Conda / pytorch/audio / conda-py3_8-cuda12_1 (gh)
  The process '/__w/audio/audio/3/condabin/conda' failed with exit code 1
• Integration Test / build (3.8) (gh)
  E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/m/mesa/mesa-vdpau-drivers_23.0.4-0ubuntu1%7e22.04.1_amd64.deb 404 Not Found [IP: 52.147.219.192 80]

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

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

• Unittests on Windows CPU / unittests-windows-cpu / windows-job (gh)
  ImportError: DLL load failed while importing _C: The specified module could not be found.
• Unittests on Windows GPU / unittests-windows-gpu / windows-job (gh)
  ImportError: DLL load failed while importing _C: The specified module could not be found.

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