Update README.md and app.py: change SDK version and modify heatmap figure creation

README.md

@@ -4,7 +4,7 @@ emoji: 👁️
 colorFrom: yellow
 colorTo: purple
 sdk: gradio
-sdk_version: 4.44.0
+sdk_version: 5.9.1
 app_file: app.py
 pinned: false
 license: mit

app.py

@@ -259,7 +259,7 @@ def generate_colgemma_heatmap(
         )
 
         # Create matplotlib figure
-        fig, ax = plt.subplots(figsize=(10, 10))
+        _, ax = plt.subplots(figsize=(10, 10))
         ax.imshow(img_array)
         ax.imshow(
             similarity_map_image,