Update duckdb index files

.gitattributes

@@ -61,3 +61,4 @@ in-domain/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 aspect-normalized-out-of-domain/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 in-domain/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 out-of-domain/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+out-of-domain/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

out-of-domain/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ed41c27eb8ee9d3296acb54016924fad8a221797e3fb6df3cf396751edccbe2b
+size 5294010368