change preset default - fastest inference

app.py

@@ -280,7 +280,7 @@ def main():
             preset_film = False
             preset_lcm = False
         elif preset_option.startswith("Low quality"):
-            preset_model = "Base Stable Diffusion V1-5"
+            preset_model = "Base Stable Diffusion V2-1"
             preset_film = False
             preset_lcm = True
         elif preset_option.startswith("Creative morph"):