Update duckdb index files

.gitattributes

@@ -75,3 +75,4 @@ Hindi[[:space:]](HI)/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Hindi[[:space:]](HI)/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Italian[[:space:]](IT)/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Italian[[:space:]](IT)/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Italian[[:space:]](IT)/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

Italian (IT)/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:76d92334ee555d62c324e1f91d78a86892e9a94242f7b7ab9669e369c51a2ac0
+size 1060864