Update duckdb index files

.gitattributes

@@ -88,3 +88,4 @@ iwslt2017-en-ro/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-it-ro/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-en-zh/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-it-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+iwslt2017-fr-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-fr-en/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1ebe6d2825e8802b6e68d83a62ad1593dae07c048430cb63472d962e34f72e58
+size 1060864