Update duckdb index files

.gitattributes

@@ -556,3 +556,4 @@ default/sat.test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/ug.train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/uk.validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/vi.test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/ur.validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/ur.validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:325763c1326885949cd42437669bbb37e0d3efc4de48d79174164bbd2147d357
+size 2633728