Increase operations per run

Author: minimalsm

.github/workflows/stale.yml

@@ -19,4 +19,4 @@ jobs:
           stale-pr-message: "This issue is stale because it has been open 30 days with no activity."
           days-before-stale: 30
           days-before-close: -1
-          operations-per-run: 100
+          operations-per-run: 250