Update beat_the_ai.py

beat_the_ai.py

@@ -41,7 +41,7 @@ f"     * 6.6 - 10.0 = Hard\n\n"
         "B) [Option B]\n"
         "C) [Option C]\n"
         "D) [Option D]\n"
-        "Correct answer: [Correct option letter]\n"
+        "Correct answer: [Correct option letter]. Just return the option A, B, C or D and nothing else.\n"
         "Difficulty level: [Easy/Medium/Hard]"
         "Do not provide the parameter details just consider them for yourself."
     )