Update duckdb index files

.gitattributes

@@ -18,3 +18,4 @@ default/train/0001.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0002.parquet filter=lfs diff=lfs merge=lfs -text
 default/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/index.duckdb 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 sha256:81ebde59367c104c9b78f6b43f81ac382335855403014b423f549803e4165fb8
+size 853815296