Update duckdb index files

.gitattributes

@@ -1,3 +1,4 @@
 nthngdy--bananas/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 nthngdy--bananas/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 nthngdy--bananas/validation/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:e795c2e3f8f44cecd1e6625801e347c0bd021dafdeeac581267af4646dedac7b
+size 1323008