Update duckdb index files

.gitattributes

@@ -71,3 +71,4 @@ cs-lv/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs-mt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs-nl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs-pt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cs-pl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

cs-pl/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3c1cff666cc759fe3e6d2f968f9f041325e5181c3b43bfa8cb5baf7b5ecc01c4
+size 46936064