chore(github-actions): add action to close stale issues and PRs

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: 🐛 Bug report
 about: Create a report to help us improve Postal and fix issues.
 title: ''
-labels: bug
+labels: ''
 assignees: ''
 
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