Update duckdb index files

.gitattributes

@@ -142,3 +142,4 @@ default/cseducators.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs
 default/arduino.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/vi.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/drupal.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/math.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/math.stackexchange.com/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:30e19b9b5b321449ba9403dd723b54e6b31306b240645a6f49bab7a1a0909847
+size 62402560