give contributor points for marking issues as duplicates (#6659)

* reward closing issues as duplicates

* note

* remove debugging

.github/scripts/count-points.mjs

@@ -278,7 +278,7 @@ async function countContributorPoints() {
 
             if (
               event.event === 'closed' &&
-              event.state_reason === 'not_planned'
+              ['not_planned', 'duplicate'].includes(event.state_reason)
             ) {
               const closer = event.actor.login;
               const userStats = stats.get(closer);

upcoming-release-notes/6659.md

@@ -0,0 +1,6 @@
+---
+category: Maintenance
+authors: [matt-fidd]
+---
+
+Give contributor points for marking issues as duplicates