fix bug (typo method)

libri_light.py

@@ -153,7 +153,7 @@ class LibriLight(datasets.GeneratorBasedBuilder):
         for path, f in files:
             if path.endswith(".flac"):
                 path_split = path.split("/")
-                audio_file = path._split[-1]
+                audio_file = path_split[-1]
                 id_ = audio_file.replace(".flac", "")
                 file = path if local_extracted_archive else audio_file
                 audio = {"path": file, "bytes": f.read()}