Process more stale PRs, oldest first (pythonGH-31407)

Author: hugovk

.github/workflows/stale.yml

@@ -23,6 +23,8 @@ jobs:
         stale-pr-label: 'stale'
         days-before-stale: 30
         days-before-close: -1
+        ascending: true
+        operations-per-run: 120
 
     - name: "Check PRs with 'CLA not signed' label"
       uses: actions/stale@v4
@@ -34,3 +36,5 @@ jobs:
         close-pr-message: 'Closing this stale PR because the CLA is still not signed.'
         days-before-stale: 30
         days-before-close: 14
+        ascending: true
+        operations-per-run: 120