Add text-to-image pipeline tag and link to code repository

This PR ensures people can find it at https://huggingface.co/models?pipeline_tag=text-to-image.

Also adds a link to the Github repository, so people can easier access the code.

README.md

@@ -1,10 +1,11 @@
 ---
+library_name: diffusers
 license: openrail++
 tags:
 - text-to-image
 - stable-diffusion
-library_name: diffusers
 inference: false
+pipeline_tag: text-to-image
 ---
 
 # SDXL-Lightning
@@ -134,11 +135,13 @@ Use LoRA only if you are using non-SDXL base models. Otherwise use our full chec
 The 1-step model is only experimental and the quality is much less stable. Consider using the 2-step model for much better quality.
 
 1. Update your ComfyUI to the latest version.
-1. Download the full checkpoint (`sdxl_lightning_1step_x0.safetensors`) to `/ComfyUI/models/checkpoints`.
-1. Download our [ComfyUI full 1-step workflow](comfyui/sdxl_lightning_workflow_full_1step.json).
+2. Download the full checkpoint (`sdxl_lightning_1step_x0.safetensors`) to `/ComfyUI/models/checkpoints`.
+3. Download our [ComfyUI full 1-step workflow](comfyui/sdxl_lightning_workflow_full_1step.json).
 
 ![SDXL-Lightning ComfyUI Full 1-Step Workflow](comfyui/sdxl_lightning_workflow_full_1step.jpg)
 
+## Source Code
+Code is available at https://github.com/ByteDance/SDXL-Lightning
 
 ## Cite Our Work
 ```