Update duckdb index files

.gitattributes

@@ -561,3 +561,4 @@ default/mathematica/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/photo/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/meta.stackexchange/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/mythology/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/matheducators/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/matheducators/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:711472e0589b255c927a6e8215b0e5d4ea134ef7676f5870187f69e1ed9412de
+size 66596864