Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ nli/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 nli/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 segmentation/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 segmentation/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+segmentation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

segmentation/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:145d6ab42d97fb6baed81fea2fac42580faedf081bf21eae53f737a1173bfd5c
+size 2109440