Update duckdb index files

.gitattributes

@@ -51,3 +51,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
+Rosenberg--webnlg/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

Rosenberg--webnlg/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c24172c84dc1a4436f8eda874a8d598047581fee0a90f2c6970ee758f473972f
+size 1060864