Update duckdb index files

.gitattributes

@@ -6,3 +6,4 @@ beyond--20NG/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 beyond--20NG/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/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 sha256:91c296648649558999409689535ac991d02ee475f4c3edd011e4f9943a87de1d
+size 22556672