Update app.py

app.py

@@ -27,7 +27,7 @@ def dog_average_longevity(dog_breed: str)-> str:
         for result in results:
             lifespan = extract_lifespan(result)
             if lifespan:
-                return f"The average lifespan of a {breed} is {lifespan} years."
+                return f"The average lifespan of a {dog_breed} is {lifespan} years."
     
     return "No reliable lifespan information found. Please check with a veterinarian."