Fix a bug of computing oriented bounding box in tensor

[qrcat]

An error occurs in computing oriented bounding box became the operation is absence of matrix transpose.
Therefore, the obb will just like an inverted box hence the bunny's ear is out of bbx.

As the unit test has used a cube, the error could not be detected by programme automatically.

After fixing, the bounding box will be in a right place.

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[update-docs]

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