Update duckdb index files

.gitattributes

@@ -79,3 +79,4 @@ en_gum-corefud/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 en_gum-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 no_bokmaalnarc-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hu_szegedkoref-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+hu_szegedkoref-corefud/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

hu_szegedkoref-corefud/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8a4d284b6b9e8bcb336bdc12fbc70b5d130f49bdaa0e67e12738eea0d70370e5
+size 19673088