Fix tensor data elem type conversion in book (#2211) #62

Job	Run time
publish-burn-common / publish-crate	40s
publish-burn-derive / publish-crate	39s
publish-burn-tensor-testgen / publish-crate	34s
publish-onnx-ir / publish-crate	59s
publish-burn-tensor / publish-crate	36s
publish-burn-dataset / publish-crate	38s
publish-burn-fusion / publish-crate	42s
publish-burn-autodiff / publish-crate	51s
publish-burn-ndarray / publish-crate	1m 4s
publish-burn-tch / publish-crate	39s
publish-burn-candle / publish-crate	37s
publish-burn-jit / publish-crate	50s
publish-burn-wgpu / publish-crate	44s
publish-burn-cuda / publish-crate	38s
publish-burn-core / publish-crate	39s
publish-burn-train / publish-crate	46s
publish-burn / publish-crate	37s
publish-burn-import / publish-crate	1m 5s
	13m 18s

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