Update app.py

app.py

@@ -4,6 +4,7 @@ import sys
 from pathlib import Path
 
 models = [
+    {"name": "Stable Diffusion 2", "url": "stabilityai/stable-diffusion-2-1"},
     {"name": "Future Diffusion", "url": "nitrosocke/Future-Diffusion"},
     {"name": "JWST Deep Space Diffusion", "url": "dallinmackay/JWST-Deep-Space-diffusion"},
     {"name": "Robo Diffusion 3 Base", "url": "nousr/robo-diffusion-2-base"},