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docs: correct path format description in Windows CUDA docsUpdate the instructions in the Windows CUDA Acceleration documentation toreflect the correct path format. Specifically, clarify that Windows paths
should include the drive letter and replace backslashes with forward slashes.

Update the URLs for downloading the `magic-pdf.template.json` and `small_ocr.pdf`
files in the Windows CUDA acceleration guides. The links now point to the giteerepository instead of GitHub, ensuring users have access to the necessary files
from the correct source.