Update duckdb index files

.gitattributes

@@ -250,3 +250,4 @@ bengali/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bengali/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bengali/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 burmese/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+burmese/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

burmese/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d80b6077da2d169ef7071846715ad6c86cecbaa6ab86ec985e0965f90d42275b
+size 2633728