Update duckdb index files

.gitattributes

@@ -49,3 +49,4 @@ bg-it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bg-lt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bg-lv/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bg-mt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+bg-nl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

bg-nl/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a02677c6dd9969e35e2d20e202286f23b46bd9e9b2a90f9e242dc746a31ed74c
+size 83111936