Update app.py

app.py

@@ -395,7 +395,7 @@ def update_history(new_image, history):
     history.insert(0, new_image)
     return history
 
-ccss = '''
+css = '''
 #gen_btn{height: 100%}
 #title{text-align: center}
 #title h1{font-size: 3em; display:inline-flex; align-items:center}