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
 tasksource--lexcomp-nc-relation/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 tasksource--lexcomp-nc-relation/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+tasksource--lexcomp-nc-relation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

tasksource--lexcomp-nc-relation/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c68af0d6785fbb97eedfa11d5e08c71b651b8598bbce3e7cf173cb20c6605bf6
+size 1060864