Support for <maybe someday> label (#1128)

.github/workflows/stale.yml

@@ -12,6 +12,6 @@ jobs:
           repo-token: ${{ secrets.GH_PAT_BOT }}
           stale-issue-message: 'This issue has been open for 21 days with no activity and is not labelled as an enhancement. It will be closed in 7 days.'
           stale-issue-label: 'stale'
-          exempt-issue-labels: '-size-l,-size-m,-size-s,-size-xl,-size-xs,[bug]'
+          exempt-issue-labels: '-size-l,-size-m,-size-s,-size-xl,-size-xs,[bug],<maybe someday>'
           days-before-stale: 21
           days-before-close: 7