Update duckdb index files

.gitattributes

@@ -4,3 +4,4 @@ sudo-s--example1/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sudo-s--example1/train/index.duckdb 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/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 sha256:807b7c3ec96745d17141f4b2316662ee6ee366032d0c2935dd3eddbcb3061d8a
+size 8925184