Update duckdb index files

.gitattributes

@@ -60,3 +60,4 @@ Haskell/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Java/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Javascript/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 Julia/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+Kotlin/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

Kotlin/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c3476873a7d456350476a5d2b07ea9deb75b2b662ad7ae4fae7dc6fecd046bd9
+size 3158016