Update duckdb index files

.gitattributes

@@ -61,3 +61,4 @@ pl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 nl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hu/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+nl/train/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text

nl/train/partial-index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2b640408b62c0fbe9dc0fa43bc2139d944d1226c6747318b8bda1720bbaeef82
+size 4282134528