Update duckdb index files

.gitattributes

@@ -322,3 +322,4 @@ cs_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 all_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 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

bg_wikipedia/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f86e88cb8800cd28b7ab5b83dd0ac2d8b01e900aa0297f33eca84faa54853217
+size 5255168