Improve sample usage section with code snippets

This PR enhances the "Sample Usage" section of the model card by directly embedding command-line code snippets from the GitHub repository, making it easier for users to get started with inference. The current paper link (arXiv), project page, code link, and metadata remain unchanged as they are already correctly specified or align with best practices.

README.md

@@ -18,7 +18,19 @@ UP2You is a tuning-free framework for 3D human reconstruction from unconstrained
 
 ## Sample Usage
 
-To run the inference demo, please refer to [https://github.com/zcai0612/UP2You](https://github.com/zcai0612/UP2You) for more details.
+To run the inference pipeline with example images:
+```bash
+python inference_low_gpu.py \
+    --base_model_path stabilityai/stable-diffusion-2-1-base  \
+    --segment_model_name briaai/RMBG-2.0 \
+    --data_dir examples \
+    --output_dir outputs \
+```
+Alternatively, you can use the provided shell script:
+```bash
+bash run.sh
+```
+`examples` is the folder containing your unconstrained photos, and `outputs` is the directory where the generated 3D reconstruction results will be saved.
 
 ## Citation