Fix docstring style to match torchvision guidelines

[yakshithkd23]

Updated docstring formatting for _parallelogram_to_bounding_boxes function.

[pytorch-bot]

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[yakshithkd23]

Hi, could a maintainer please approve and run the workflows? Thank you!

[yakshithkd23]

@zy1git Thanks for pointing that out! You're right — issue #400 is unrelated. I mistakenly referenced the wrong issue.

This PR only improves the ImageFolder documentation for clarity and is not directly linked to any specific issue. I will update the PR description to remove the incorrect reference.

[zy1git]

@yakshithkd23 I started the CI tests. By the way, why the comment below shows up in this PR? I think it should be in PR 9353.

"@zy1git Thanks for pointing that out! You're right — issue #400 is unrelated. I mistakenly referenced the wrong issue.

This PR only improves the ImageFolder documentation for clarity and is not directly linked to any specific issue. I will update the PR description to remove the incorrect reference."