Update duckdb index files

.gitattributes

@@ -2,3 +2,4 @@ projecte-aina--Parafraseja/json-train.parquet filter=lfs diff=lfs merge=lfs -tex
 Parafraseja/parafraseja-train.parquet filter=lfs diff=lfs merge=lfs -text
 Parafraseja/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Parafraseja/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Parafraseja/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

Parafraseja/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a93cd04c5791f8bd38c2d0f8176dfe356608239a0951b4483d1dc46e3eec25e2
+size 1585152