Update duckdb index files

.gitattributes

@@ -69,3 +69,4 @@ French[[:space:]](FR)/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 French[[:space:]](FR)/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 German[[:space:]](DE)/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 German[[:space:]](DE)/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+German[[:space:]](DE)/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

German (DE)/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b325f82f61ab56add04d25907222a1c811ef730ea522b9b63522eae3389dcc63
+size 1060864