change python code to use 13b instead of 7b

README.md

@@ -60,7 +60,7 @@ You can use the model for inference tasks like question-answering and medical di
 
 from transformers import pipeline
 
-qa_pipeline = pipeline("question-answering", model="medalpaca/medalpaca-7b", tokenizer="medalpaca/medalpaca-7b")
+qa_pipeline = pipeline("question-answering", model="medalpaca/medalpaca-13b", tokenizer="medalpaca/medalpaca-13b")
 question = "What are the symptoms of diabetes?"
 context = "Diabetes is a metabolic disease that causes high blood sugar. The symptoms include increased thirst, frequent urination, and unexplained weight loss."
 answer = qa_pipeline({"question": question, "context": context})