fix bug (wrong index for speaker_id)

libri_light.py

@@ -157,7 +157,7 @@ class LibriLight(datasets.GeneratorBasedBuilder):
                 id_ = audio_file.replace(".flac", "")
                 file = path if local_extracted_archive else audio_file
                 audio = {"path": file, "bytes": f.read()}
-                speaker_id = int(path_split[-2])
+                speaker_id = int(path_split[-3])
                 path_json = path.replace(".flac", ".json")
                 with open(path_json) as json_file:
                     metadata = json.load(json_file)