Create README.md for model_llama3_recipe

model_llama3_recipe/README.md

@@ -0,0 +1,7 @@
+# How to download llama3 model with different variants
+We need to set `hf_token=<hf_token>`. `<hf_token>` is an input token for huggingface.
+- variant = 8B(by default)
+
+```
+ time axs byquery downloaded,hf_model,model_family=llama3,variant=8B,hf_token=<hf_token>
+```