Update duckdb index files

.gitattributes

@@ -369,3 +369,4 @@ russian/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 portuguese/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 spanish/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ukrainian/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+urdu/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

urdu/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:393d8f9d9df47c24bbeff349be48b078ba920d593a693b0ffe9897b65e8708a0
+size 250097664