Update duckdb index files

.gitattributes

@@ -16,3 +16,4 @@ en-lv/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en-mt/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en-nl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en-no/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+en-pl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

en-pl/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:170a31b60a1f63c79c56a820fe5fa0d8bb0c3e98b51d4b3a9a242b614e4d8a54
+size 1585152