Update duckdb index files

.gitattributes

@@ -6,3 +6,4 @@ xusenlin--duie/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 xusenlin--duie/validation/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/validation/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:e0a45750de3944a531cf07a150e8aeb1094a17faabf56e85666d311e667046cc
+size 45625344