Update duckdb index files

.gitattributes

@@ -16,3 +16,4 @@ eng_Latn-dyu_Latn/valid/index.duckdb filter=lfs diff=lfs merge=lfs -text
 eng_Latn-fur_Latn/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 eng_Latn-fur_Latn/valid/index.duckdb filter=lfs diff=lfs merge=lfs -text
 eng_Latn-fur_Latn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+eng_Latn-rus_Cyrl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

eng_Latn-rus_Cyrl/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6326269df79963183052c2a387f8fdf3fb02f56a472eb036a2fe56e93bcf4dad
+size 2633728