Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 larrylawl--chinese-lexical-normalization/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+larrylawl--chinese-lexical-normalization/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

larrylawl--chinese-lexical-normalization/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:556b1ad7afde0c343067f42d61314e9e1e7b12e70fe82e799e730cc210533608
+size 1585152