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
+eb23--langchain-docs/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

eb23--langchain-docs/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:78d08132814c22e44ee7ee1779f0538c0dc0fc78b2db24fd89e6a3cb30474497
+size 8400896