Update duckdb index files

.gitattributes

@@ -125,3 +125,4 @@ default/codereview.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs
 default/robotics.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/scicomp.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/reverseengineering.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/opensource.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/opensource.stackexchange.com/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2c88fc3c3cbbe1e2162c1a19d3d8a362227d06b46e75677ba91988b62e758b40
+size 1847296