Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ jxu124--refcocog/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 jxu124--refcocog/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 jxu124--refcocog/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/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:ba5c034a91e7fa47457afc3faa9bcae4a7ec86577fd65199d4af154b9cee8c4e
+size 90189824