Update duckdb index files

.gitattributes

@@ -10,3 +10,4 @@ ARTeLab--mlsum-it/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/validation/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
+default/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3d5a062e2929f39425d0ac7af2555d8ef8d0335b3fbfe927303aeb01fd110bac
+size 9449472