Update duckdb index files

.gitattributes

@@ -58,3 +58,4 @@ siyangliu--reddit_mhp/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 siyangliu--reddit_mhp/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 siyangliu--reddit_mhp/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 lsy641--reddit_mhp/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+lsy641--reddit_mhp/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

lsy641--reddit_mhp/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8dc6331a3d3eb3697abccb0a585ce943f39d6e3b3bb521062b6d9b02122ecee9
+size 26226688