Update duckdb index files

.gitattributes

@@ -61,3 +61,4 @@ company/challenge_test_topic_diversity_1/index.duckdb filter=lfs diff=lfs merge=
 company/challenge_test_topic_diversity_2/index.duckdb filter=lfs diff=lfs merge=lfs -text
 company/challenge_test_topic_diversity_3/index.duckdb filter=lfs diff=lfs merge=lfs -text
 company/challenge_test_topic_diversity_4/index.duckdb filter=lfs diff=lfs merge=lfs -text
+company/challenge_test_topic_diversity_6/index.duckdb filter=lfs diff=lfs merge=lfs -text

company/challenge_test_topic_diversity_6/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f980b4a58c7a8f132963b684a94b6f69bb3ad27660f801f5d53ad0e39d5b59e9
+size 3682304