Update duckdb index files

.gitattributes

@@ -70,3 +70,4 @@ default/funcodec_zh_en_16k_nq32ds320/index.duckdb filter=lfs diff=lfs merge=lfs
 default/funcodec_zh_en_16k_nq32ds640/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/speech_tokenizer_16k/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/encodec_24k_12bps/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/encodec_24k_1_5bps/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/encodec_24k_1_5bps/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4383fa1c008340c7d8a7499fb05bcc5a9e964df6edcd7cd4434da7dcc95f6f0d
+size 83374080