Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ default/sentence_valid/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/sentence_train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/homograph_test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/homograph_train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/homograph_valid/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/homograph_valid/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:505c3e2cd5521bccce7458fefd8d38adb6b2d5a981caf9fc5f60101c5c62c36f
+size 1060864