Update duckdb index files

.gitattributes

@@ -73,3 +73,4 @@ film/challenge_test_abstractivity_2/index.duckdb filter=lfs diff=lfs merge=lfs -
 film/challenge_test_abstractivity_3/index.duckdb filter=lfs diff=lfs merge=lfs -text
 film/challenge_test_abstractivity_5/index.duckdb filter=lfs diff=lfs merge=lfs -text
 film/challenge_test_abstractivity_4/index.duckdb filter=lfs diff=lfs merge=lfs -text
+film/challenge_test_abstractivity_6/index.duckdb filter=lfs diff=lfs merge=lfs -text

film/challenge_test_abstractivity_6/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9f9bd27480b9e3425f3134555f39aa13356d3bd8f8f34fccb3096cab9444d888
+size 5779456