Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ chloeliu--lyrics/csv-train.parquet filter=lfs diff=lfs merge=lfs -text
 chloeliu--lyrics/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 chloeliu--lyrics/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6782fb5ee0c4402ee8ba96395001d140303e2e24ce890c6b254c8d7cf6875c2c
+size 29896704