Update duckdb index files

.gitattributes

@@ -55,3 +55,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 Yuhthe--samsum/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Yuhthe--samsum/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Yuhthe--samsum/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

Yuhthe--samsum/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a2e33b3419c6b4813550226310f43943c1f6e29407e892473493b22e830206ba
+size 15478784