Update duckdb index files

.gitattributes

@@ -33,3 +33,4 @@ fr-de/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fr-de/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 gu-en/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 gu-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+kk-en/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

kk-en/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ac28d37887da12ec41a7573f7761276846c4b488b30ea5622697a5feca101010
+size 5779456