Update duckdb index files

.gitattributes

@@ -78,3 +78,4 @@ default/encodec_24k_1_5bps/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/dac_44k/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/encodec_24k_24bps/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/encodec_24k_6bps/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/encodec_24k_3bps/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/encodec_24k_3bps/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fb5c7c493094f3b5fb499d0919c593f7b8c1c2a4ddc6626acebd9b016a220e49
+size 694693888