Update duckdb index files

.gitattributes

@@ -71,3 +71,4 @@ musique/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 triviaqa/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 passage_count/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 repobench-p/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+lcc/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

lcc/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:44d7d22d08f91a9b8102c5a83a708ca093b4c1accb3bac76765240d14363b9af
+size 6828032