Update duckdb index files

.gitattributes

@@ -1462,3 +1462,4 @@ de_es/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_hi/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_id/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+de_ja/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

de_ja/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a85a19b99387683b253e870489dad6e0dc4ce0777acd2f591df579afc0f601f7
+size 406859776