Update duckdb index files

.gitattributes

@@ -70,3 +70,4 @@ pt/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 pt/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ru/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ru/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ru/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

ru/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:60283a856c547413eb642de6ade355a739413f98c7ee34103e407091535c15f6
+size 2633728