Update duckdb index files

.gitattributes

@@ -306,3 +306,4 @@ pidgin/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 persian/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pidgin/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 portuguese/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+portuguese/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

portuguese/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:75221254629d76a1eeca76b6dc3352a92ce9fb1ad8f9e0fe8db4b41d7605c7b2
+size 52703232