Update duckdb index files

.gitattributes

@@ -54,3 +54,4 @@ 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
 arubenruben--brazilian_literature/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+arubenruben--brazilian_literature/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

arubenruben--brazilian_literature/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:de18af9ab7487886874217fb3b1df7fb234135a2ddf3544f838c054d0d2f0202
+size 66859008