Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+nishantup--langchain-docs/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

nishantup--langchain-docs/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:18d154e4fc99aa6f4f8d8b57f999355856614193a0f46635f5ad1d3f1c2eb271
+size 9449472