Update duckdb index files

.gitattributes

@@ -71,3 +71,4 @@ default/funcodec_en_libritts_16k_nq32ds320/index.duckdb filter=lfs diff=lfs merg
 default/funcodec_en_libritts_16k_nq32ds640/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/funcodec_zh_en_16k_nq32ds320/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/speech_tokenizer_16k/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/funcodec_zh_en_16k_nq32ds640/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/funcodec_zh_en_16k_nq32ds640/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bf05d57c678c53546d66549d3e875224791ffce024fe36bafdd9fda424348298
+size 30945280