Fix model card: correct ONNX input/output names (canny_image, down_residual_*, mid_residual)

Update model card (Phase 7 — SD 1.5 ControlNet Canny ONNX FP16 (Path A spike artefact))

Phase 7 — SD 1.5 ControlNet Canny ONNX FP16 (Path A spike artefact)

initial commit