Update duckdb index files

.gitattributes

@@ -4,3 +4,4 @@ enimai--MuST-C-de/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 enimai--MuST-C-de/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 enimai--MuST-C-de/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+default/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fb83fc8f8409a01bb5a5ae383fa5f0c19c5b8f626ecf91562695582476e9a062
+size 1323008