Consume half of the 1000 operations per hour limit of GitHub API

Author: PowerKiKi

.github/workflows/stale.yml

@@ -13,6 +13,7 @@ jobs:
     steps:
       - uses: actions/stale@v5
         with:
+          operations-per-run: 500 # allow to consume half of the 1000 operations per hour limit of GitHub API
           ascending: true # oldest issues first
           days-before-stale: 90
           days-before-close: 60