Update duckdb index files

.gitattributes

@@ -170,3 +170,4 @@ dpr-first-15%-maxlen-150/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 dpr-first-15%-maxlen-300/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 dpr-first-15%-maxlen-300/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 dpr-first-15%-maxlen-300/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+dpr-first-20%-maxlen-150/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

dpr-first-20%-maxlen-150/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:71d0ffde93ac86667b64a5141e27b5d8b5b09fa9b78550bcac9c92e3d8ec2f94
+size 3682304