Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ NEUDM--absa-quad/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 NEUDM--absa-quad/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/validation/index.duckdb 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 sha256:711cea908a5d116c7185dac74f3fa308356f2629737605d8c2ae9bacf4f06342
+size 1847296