Update duckdb index files

.gitattributes

@@ -68,3 +68,4 @@ metaphors-dataset/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 similes-dataset/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 idioms-dataset/dataset/index.duckdb filter=lfs diff=lfs merge=lfs -text
 metaphors-dataset/dataset/index.duckdb filter=lfs diff=lfs merge=lfs -text
+similes-dataset/dataset/index.duckdb filter=lfs diff=lfs merge=lfs -text

similes-dataset/dataset/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:96abb2c0e9e682953e5c0ed80b09a7951a791d936faa17470b605af47f54ac56
+size 1585152