ci : close all stale issues at once (ggml-org#6115)

Author: ggerganov

.github/workflows/close-issue.yml

@@ -19,4 +19,5 @@ jobs:
           close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
           days-before-pr-stale: -1
           days-before-pr-close: -1
+          operations-per-run: 1000
           repo-token: ${{ secrets.GITHUB_TOKEN }}