Update app.py

app.py

@@ -23,7 +23,7 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
 
 class BasicAgent:
-    def __init__(self, model="google/gemma-2b"):  # Smaller 2B version recommended
+    def __init__(self, model="mistral-7b-instruct-v0.1"):  # Smaller model recommended
         self.tokenizer = AutoTokenizer.from_pretrained(model)
         self.model = AutoModelForCausalLM.from_pretrained(
             model,