Update duckdb index files

.gitattributes

@@ -281,3 +281,4 @@ sk_caselaw/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sl_wikipedia/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sl_caselaw/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sv_caselaw/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+nl_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

nl_legislation/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7e255d00411e46f86610aefc3d82d6faf05024cba5c5919ac293987874e178dc
+size 60567552