Update duckdb index files

.gitattributes

@@ -311,3 +311,4 @@ punjabi/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 punjabi/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 punjabi/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 russian/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+scottish_gaelic/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

scottish_gaelic/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:120fb2648ac74983f46e3568263867148f2db7d8da0be52a7aac595bdd465c8c
+size 3158016