Update duckdb index files

.gitattributes

@@ -67,3 +67,4 @@ default/encodec_24k_3bps/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/encodec_24k_6bps/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/funcodec_en_libritts_16k_gr1nq32ds320/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/funcodec_en_libritts_16k_gr8nq32ds320/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/funcodec_en_libritts_16k_nq32ds640/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/funcodec_en_libritts_16k_nq32ds640/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:100dd09a7138c39e60482b8f0233b97c740f15f204488c86434c96a3ec6322a2
+size 89665536