Update duckdb index files

.gitattributes

@@ -316,3 +316,4 @@ unshuffled_original_sl/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 unshuffled_deduplicated_pt/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 unshuffled_original_de/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 unshuffled_original_ro/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+unshuffled_original_cs/partial-train/index.duckdb filter=lfs diff=lfs merge=lfs -text

unshuffled_original_cs/partial-train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ba4c05abd68a44327cb6756b696c088afe3bbbdeec89af4ca702f0a6fe3ea37d
+size 9525538816