Update duckdb index files

.gitattributes

@@ -240,3 +240,4 @@ sl_contracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sv_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sk_contracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sv_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+sk_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

sk_wikipedia/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:935e2ceabf60ea7ee8f6315b4892e6122e2daa7d173cfaa40c8acb10c4ee61bf
+size 11022336