Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ aseifert--merlin/json-train.parquet filter=lfs diff=lfs merge=lfs -text
 aseifert--merlin/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 aseifert--merlin/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:51b7dddf3eb637e7f0ae4b71509633e36131fd065bd8358eb124cd3fb3e06fe4
+size 7876608