Update app.py

app.py

@@ -16,6 +16,7 @@ checkpoints = {
     "2-Step" : ["sdxl_lightning_2step_unet.safetensors", 2],
     "4-Step" : ["sdxl_lightning_4step_unet.safetensors", 4],
     "8-Step" : ["sdxl_lightning_8step_unet.safetensors", 8],
+    "16-Step" : ["sdxl_lightning_8step_unet.safetensors", 16],
 }
 loaded = None