Fix syntax error

app.py

@@ -16,7 +16,7 @@ def run_inference(input_img):
     # input_mg: NumPy array with the shape (width, height, 3)
 
     # Save input_mg as a temporary file
-    tmpfile = create_temp_file_path(prefix="input_", suffix, ".png")
+    tmpfile = create_temp_file_path(prefix="input_", suffix=".png")
     im = Image.fromarray(input_img)
     im.save(tmpfile)