Update duckdb index files

.gitattributes

@@ -243,3 +243,4 @@ sv_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sk_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sv_contracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cs_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

cs_wikipedia/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a3e85ba1058e7ad945c40618f8bddc3eebcb213562b188110f4e311783d8b70b
+size 16265216