Added note on lm head warning

README.md

@@ -118,4 +118,5 @@ tensor([[0.7161, 0.4021],
         [0.4525, 0.7370]])
 """
 
-```
+```
+*Note: When running the above a warning will appear indicating that lm_head.weight was not used. This layer is only for token prediction and is not required for embedding extraction, so the warning safely be ignored.*