Update README.md

Load the model in the following way (same as Mistral):

```[python]
from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

model_id = 'linjc16/Panacea-7B-Chat'

model = AutoModelForCausalLM.from_pretrained(model_id, torch_dtype=torch.float16, device_map="auto", cache_dir="/data/jl254/cache/")
tokenizer = AutoTokenizer.from_pretrained(model_id)

README.md

@@ -1,3 +1,11 @@
----
-license: apache-2.0
----
+---
+license: apache-2.0
+language:
+- en
+base_model:
+- mistralai/Mistral-7B-v0.1
+pipeline_tag: text-generation
+tags:
+- clinical trial
+- foundation model
+---