Update duckdb index files

.gitattributes

@@ -81,3 +81,4 @@ transcribe_sk/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 translate_sk/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 transcribe_sl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 translate_sl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+multilang/train/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text

multilang/train/partial-index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:006fea3faf8070cabd6e7d5f516caa97d32ec62e9345b5b025ac3dc44124004c
+size 7045656576