Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 9wimu9--SinQuAD/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 9wimu9--SinQuAD/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/validation/index.duckdb 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 sha256:1657d3ad265c2bcd36b8017474762947d4e9383e087d50af9df5ae6a09f93450
+size 40644608