Update app.py

app.py

@@ -193,4 +193,4 @@ def fig2img(fig):
     img = Image.open(buf)
     return img
 
-chart_generator = GenerateChart(data.get("gpus", {}), bubble_spacing=0.1, n_bins=5)
+chart_generator = GenerateChart(sample_data.get("gpus", {}), bubble_spacing=0.1, n_bins=5)