Update duckdb index files

.gitattributes

@@ -59,3 +59,4 @@ all_languages/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

en/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bc7f9456168e01adf6173c07674209b9ab82369167a7921ab92760349171648c
+size 1323008