Update duckdb index files

.gitattributes

@@ -52,3 +52,4 @@ 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
+matteopilotto--langchain-docs-test/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

matteopilotto--langchain-docs-test/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:22217c991fc2476d533e591debc8acca8e316d5f6d82277107767696876dc984
+size 3682304