Update app.py

app.py

@@ -173,8 +173,8 @@ chat_theme = gr.themes.Monochrome(
     background_fill_primary = "*primary_50",
     input_background_fill = "*neutral_100",
     input_border_color_focus = "*neutral_100",
-    button_secondary_background_fill = "*secondary_50",
-    button_secondary_background_fill_hover = "*secondary_100")
+    button_secondary_background_fill = "*neutral_50",
+    button_secondary_background_fill_hover = "*neutral_100")
 
 title = """# 🐑 NutriAssist 🌱"""