Update duckdb index files

.gitattributes

@@ -90,3 +90,4 @@ Multilingual[[:space:]](MULTI)/test/index.duckdb filter=lfs diff=lfs merge=lfs -
 Swedish[[:space:]](SV)/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Ukrainian[[:space:]](UK)/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Ukrainian[[:space:]](UK)/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Ukrainian[[:space:]](UK)/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

Ukrainian (UK)/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:630ebd4961c6cb9a649572ebeb13809e05a33dab1340e025c0fa73b8550c80c2
+size 1060864