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Fix mask resizing in the semantic segmentation guide - #8843
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Use nearest-neighbor interpolation for masks so resizing preserves class labels. Remove the old illustration showing blended mask boundaries. Fixes huggingface#6865 Assisted-by: Codex
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The Torchvision example now resizes masks with nearest neighbor interpolation so it doesn't create new class labels. I also removed the old output image, which shows the incorrect mask boundaries. Fixes #6865.
Checked the updated example with upscaling and downscaling, for single examples and batches. Class labels are preserved and
make qualitypasses.