Allow positional path_or_buf argument for read_json

Author: alexitkes

pandas/io/json/_json.py

@@ -332,7 +332,7 @@ def _write(
         return serialized
 
 
-@deprecate_nonkeyword_arguments(version="1.1")
+@deprecate_nonkeyword_arguments(version="1.1", allowed_args='path_or_buf')
 def read_json(
     path_or_buf=None,
     orient=None,