Update duckdb index files

.gitattributes

@@ -3,3 +3,4 @@ sinhala-nlp--SOLD/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sinhala-nlp--SOLD/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sinhala-nlp--SOLD/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
 default/train/0000.parquet filter=lfs diff=lfs merge=lfs -text
+default/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0054018951fe6b2794a818bdf5d9019e9f01e83ff330fe42775059a4c53edc37
+size 2895872