Update duckdb index files

.gitattributes

@@ -118,3 +118,4 @@ default/gis.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/gamedev.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/magento.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/mathematica.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/ethereum.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/ethereum.stackexchange.com/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:16e8acb583f891ba4957adf7a9093561ac40c11b1f1d6f62c80c16d943b5bd34
+size 39071744