Update duckdb index files

.gitattributes

@@ -324,3 +324,4 @@ bg_contracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bg_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs_other/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 sha256:996b2e7ddf4a790028c42f6c2cb16a1f43d3e577518072af31f229870b709f6c
+size 16265216