Update duckdb index files

.gitattributes

@@ -61,3 +61,4 @@ cs_pdt-corefud/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cs_pdt-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_parcorfull-corefud/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 de_parcorfull-corefud/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+de_potsdamcc-corefud/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

de_potsdamcc-corefud/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4cc14723a9d5a21e5627826e043769328baad466b03172dddfbfe66ed83a90ae
+size 5779456