Update duckdb index files

.gitattributes

@@ -54,3 +54,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 nayohan--boolq-ko/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 nayohan--boolq-ko/valid/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:ae390a8b48d29ce1430c41423291b83c09e935169405d2eccb9e6712e39bdf04
+size 7876608