Update duckdb index files

.gitattributes

@@ -308,3 +308,4 @@ 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
 punjabi/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+punjabi/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

punjabi/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3e3a46918f0e2b6a979ccae8cc753dbba0e2be3e95a1fceb608186aab37429ec
+size 28585984