stale action - set close-issue-reason as not_planned

Author: slawekjaranowski

.github/workflows/stale.yml

@@ -13,6 +13,7 @@ jobs:
           days-before-pr-stale: 365
           days-before-pr-close: 30
           stale-issue-message: 'This issue is stale because it has been open 365 days with no activity. Remove stale label or comment or this will be closed in 30 days.'
+          close-issue-reason: 'not_planned'
           days-before-issue-stale: 365
           days-before-issue-close: 30