Update app.py

app.py

@@ -96,7 +96,7 @@ st.markdown(
     }}
     </style>
     <div class="logo-container">
-        <img src="data:image/png,{img_data}" alt="FactBench Leaderboard Logo">
+        <img src="data:image/png;base64,{img_data}" alt="FactBench Leaderboard Logo">
     </div>
     """,
     unsafe_allow_html=True