Update duckdb index files

.gitattributes

@@ -67,3 +67,4 @@ cs-fr/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs-hu/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs-it/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs-lt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cs-lv/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

cs-lv/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0d281d7d9eaa6180c02d565dc46ede1b389a49f974e378f1a1e3f41704c16ada
+size 44576768