Update duckdb index files

.gitattributes

@@ -694,3 +694,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 20230901.fr/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 20230901.sv/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 20230601.it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+20230601.nl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

20230601.nl/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:39f2d205d3bfca99ca2b81350d169faf989aab64cbfc9f34895e111aad0f6ac5
+size 6239563776