Update NST.py

NST.py

@@ -201,7 +201,7 @@ class Nst(datasets.GeneratorBasedBuilder):
         for split in ["train", "test"]:
             data_urls[split] = []
             for mic in mics:
-                shard_total = _SHARDS[mic][split]
+                shard_total = _SHARDS[lang_code][split]
                 for shard_idx in range(1, shard_total + 1):
                     # .../data/{split}/nst_{lang_code}_{split}_{mic}-{shard_idx}-of-{shard_total}
                     string_formating = dict(