Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ ca/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 eu/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 fon/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ki/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+kn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

kn/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:80eafa4ba23fdff7979074e887e518294417b095bd4c3a73254eb0d98bf252cd
+size 116928512