Update duckdb index files

.gitattributes

@@ -54,3 +54,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 processed.csv filter=lfs diff=lfs merge=lfs -text
 jed351--cantonese-wikipedia/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+jed351--cantonese-wikipedia/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

jed351--cantonese-wikipedia/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:571355f4029533cd5c5fb2b9ab51db58c942ea08b4115b3a9901d7247407b71c
+size 70004736