Update stale.yml

Author: nguyenk

.github/workflows/stale.yml

@@ -13,6 +13,7 @@ jobs:
         uses: actions/github-script@v6
         with:
           script: |
+            const { Octokit } = require("@octokit/rest");
             const daysBeforeClosing = 180;
             const staleLabel = 'stale';
             const token = process.env.GITHUB_TOKEN;