Update duckdb index files

.gitattributes

@@ -61,3 +61,4 @@ Ubuntu[[:space:]]IRC/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 HackerNews/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 EuroParl/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 OpenSubtitles/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+UPSTO[[:space:]]Backgrounds/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

UPSTO Backgrounds/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d991eaa21c987f502eac67a764c8670de47f4fdd110832f30c8dfc11ea62842a
+size 1784950784