Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 skrishna--CSQA_preprocessed/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+skrishna--CSQA_preprocessed/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

skrishna--CSQA_preprocessed/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bbf0a93bda4534ab5786ba0df32482a57168b50fbda0c591b5a5a528adf53741
+size 4468736