Update app.py

image generation tool has been modified

app.py

@@ -48,7 +48,7 @@ custom_role_conversions=None,
 
 
 # Import tool from Hub
-image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)
+image_generation_tool = load_tool("black-forest-labs/FLUX.1-dev", trust_remote_code=True)
 
 with open("prompts.yaml", 'r') as stream:
     prompt_templates = yaml.safe_load(stream)