Update README.md

Using no temperature setting when "do_sample": False

README.md

@@ -133,7 +133,7 @@ pipe = pipeline(
 generation_args = {
     "max_new_tokens": 500,
     "return_full_text": False,
-    "temperature": 1.0,
+    "temperature": None,
     "do_sample": False,
 }