Fix duplicate issue closer

Broken in 9d4a04cff9

scripts/auto-close-duplicates.ts

@@ -197,6 +197,10 @@ async function closeIssueAsDuplicate(
   duplicateOfNumber: number,
   token: string,
 ): Promise<void> {
+  await githubRequest(`/repos/${owner}/${repo}/issues/${issueNumber}`, token, "PATCH", {
+    state: "closed",
+    state_reason: "duplicate",
+  });
   // Close the issue as duplicate
   await githubRequest(`/repos/${owner}/${repo}/issues/${issueNumber}/comments`, token, "POST", {
     body: `This issue has been automatically closed as a duplicate of #${duplicateOfNumber}.