update readme

Model type updated.

README.md

@@ -3,7 +3,7 @@
 ## Model details
 
 **Model type:**
-GBLM-Pruner-LLaMA-2-7B is an open-source compressed model obtained by pruning 50 percent of the weights of the LLaMA-7B model. 
+GBLM-Pruner-LLaMA-2-7B is an open-source compressed model obtained by unstructured pruning of 50 percent of the weights of the LLaMA-7B model. 
 
 ## License
 Llama 2 is licensed under the LLAMA 2 Community License,