Update duckdb index files

.gitattributes

@@ -268,3 +268,4 @@ gujarati/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 gujarati/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hausa/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hausa/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+hausa/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

hausa/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f0704413e04a964727a17d35c8cd3389190ace91d410c3d3cec3a4a0abfae16b
+size 6303744