Update duckdb index files

.gitattributes

@@ -70,3 +70,4 @@ stanfordnlp--SHP/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 stanfordnlp--SHP/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 stanfordnlp--SHP/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/index.duckdb 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:b8c66f0925f58d13f0994de2064218eaaa89acd2f41b2dc7c50de56231723909
+size 1220816896