chore: except milestones for stale issues (#879)

Author: brendt

.github/workflows/close-stale.yml

@@ -14,6 +14,7 @@ jobs:
       - uses: actions/stale@v9
         with:
           start-date: "2024-11-06T12:00:00Z"
+          exempt-all-milestones: true
           days-before-stale: 30
           days-before-close: 1
           stale-issue-label: "stale"