fix doc of read_image

[csukuangfj]

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[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/vision/8469

• 📄 Preview Python docs built from this PR

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❌ 10 New Failures, 5 Unrelated Failures

As of commit 46c4f78 with merge base a8a9f2d ():

NEW FAILURES - The following jobs have failed:

• Build M1 Conda / pytorch/vision / upload / conda-py3_8-cpu (gh)
  Unable to find any artifacts for the associated workflow
• CMake / windows (windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-linux (3.11, linux.12xlarge, cpu) / linux-job (gh)
  test/test_ops.py::TestRoIAlign::test_autocast_cpu[rois_dtype1-x_dtype1-False-False]
• Tests / unittests-macos (3.10, macos-m1-stable) / macos-job (gh)
  RuntimeError: operator torchvision::nms does not exist
• Tests / unittests-macos (3.9, macos-m1-stable) / macos-job (gh)
  RuntimeError: operator torchvision::nms does not exist
• Tests / unittests-windows (3.10, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.11, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.12, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.8, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Tests / unittests-windows (3.9, windows.4xlarge, cpu) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128

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

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

• Build M1 Wheels / pytorch/vision / upload / wheel-py3_8-cpu (gh) (trunk failure)
  Unable to find any artifacts for the associated workflow
• CMake / macos (macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: operator torchvision::nms does not exist
• Tests / unittests-macos (3.11, macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: operator torchvision::nms does not exist
• Tests / unittests-macos (3.12, macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: operator torchvision::nms does not exist
• Tests / unittests-macos (3.8, macos-m1-stable) / macos-job (gh) (trunk failure)
  RuntimeError: operator torchvision::nms does not exist

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[NicolasHug]

Thank you @csukuangfj !