Update duckdb index files

.gitattributes

@@ -4,3 +4,4 @@ boolq/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 boolq/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 copa/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 copa/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+copa/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

copa/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:692e02cdcbc2db971678e963bf9cc42b06ad113ba72410849359c53265e614fe
+size 1060864