Update duckdb index files

.gitattributes

@@ -50,3 +50,4 @@ ar_ko/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_it/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_ja/sampled_validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ar_es/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ar_pt/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

ar_pt/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2ea2e68e8fc89bc9281b56bf27ca75816da104ca0f0adb75d4137542eea58fa3
+size 88879104