Update duckdb index files

.gitattributes

@@ -58,3 +58,4 @@ pd_arxiv_abstracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sw_amps_math/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pd_news/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ccby_law/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ccby_s2orc/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ccby_s2orc/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a684e62104070a9eaecf55c1790bdb05337354a803dcb870876d527ec3b7b1c9
+size 5995245568