Update duckdb index files

iwslt2017-en-ko/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:a4337bcc7fcf5a57d7deb9df0a22c5ba7f84a4ba4e2379e7172d48829f926339
-size 28323840
+oid sha256:77cea86150a7269bdb0fc1bda2e313aa43dcad88b6e136bea23474c90d05c29a
+size 28848128