update app naming to code review

app.py

@@ -200,7 +200,7 @@ def handle_quiz(question_idx, user_answers, submitted_code, is_start):
 
     # If we've reached the end, show final results
     if question_idx >= len(quiz_data):
-        results_text = """## Quiz Complete! 📚
+        results_text = """## Code Review Complete! 📚
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