Update duckdb index files

.gitattributes

@@ -44,3 +44,4 @@ it/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 it/validation/0000.parquet filter=lfs diff=lfs merge=lfs -text
 it/test/0000.parquet filter=lfs diff=lfs merge=lfs -text
 es/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+de/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

de/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5e427c3749a36fab91587d6a107c6deac1b8bba5bce1cfd34283bc8eea7382d3
+size 23343104