Update duckdb index files

.gitattributes

@@ -54,3 +54,4 @@ dataset_merged_curated.csv filter=lfs diff=lfs merge=lfs -text
 train_final.csv filter=lfs diff=lfs merge=lfs -text
 test_final.csv filter=lfs diff=lfs merge=lfs -text
 readerbench--ro-text-summarization/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+readerbench--ro-text-summarization/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

readerbench--ro-text-summarization/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c9df5278d168953df3c4d081898db26f6a4f4a7abf8420eb24b8210034193c68
+size 408432640