Fix misleading CUDA device specification by replacing 'cuda:0' with 'cuda' #2184
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This change updates the CUDA device specification from cuda:0 to cuda to prevent confusion. Specifying cuda:0 can be misleading as it utilises all available GPUs, not just GPU 0. By using CUDA, the behaviour aligns with user expectations and improves clarity in device selection.
This issue was also discussed in #2165, where it was noted that the cuda:0 label could cause misunderstanding in multi-GPU environments. This fix ensures consistency and avoids potential misinterpretation.