Update duckdb index files

.gitattributes

@@ -129,3 +129,4 @@ default/opensource.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs
 default/or.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/softwareengineering.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/salesforce.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/retrocomputing.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/retrocomputing.stackexchange.com/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:dc890ae00e5df6e00393a96d088968643a21c2ac66879f34bb3711531d35cd2a
+size 7090176