Update duckdb index files

.gitattributes

@@ -554,3 +554,4 @@ default/money/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/patents/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/patents.meta/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/philosophy.meta/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/meta.stackoverflow/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/meta.stackoverflow/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:48200d71cec9a8a96d59835024cc2d0e2af0e3813367664d825e5059c1bce376
+size 366227456