Update duckdb index files

.gitattributes

@@ -151,3 +151,4 @@ ro_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sv_contracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sk_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sk_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+sl_contracts/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

sl_contracts/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:32c7fc8b2dc6d32c764e47af89b9bc1936b178b47c5a15e8c78c176d1f9ae427
+size 77344768