Update duckdb index files

.gitattributes

@@ -57,3 +57,4 @@ Idioms[[:space:]]Detection[[:space:]]Task/test/index.duckdb filter=lfs diff=lfs
 Metaphors[[:space:]]Detection[[:space:]]Task/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 idiom-detection-task/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 open-simile-detection-task/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+metaphor-detection-task/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

metaphor-detection-task/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1b845261fc1846e165f955ad9c64432c763807da10f59c1760362ab5fbf93c6c
+size 1323008