workflow: backport stale action should mark PRs stale after 14 days

Previously, the backport stale action marked PRs as stale after 21 days
of inactivity. This change updates the configuration to mark PRs as
stale after 14 days of inactivity, ensuring that stale backport PRs are
identified and addressed more promptly.

Epic: none
Release note: none

Author: rail

.github/workflows/backport-stale.yml

@@ -2,6 +2,7 @@ name: Mark stale backport requests
 
 on:
   schedule:
+  # Run at 10am UTC daily, except weekends
   - cron: "0 10 * * 1-4"
   workflow_dispatch:
 
@@ -12,17 +13,17 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-    - uses: actions/stale@v3
+    - uses: actions/stale@v10
       with:
         operations-per-run: 1000
         repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'Blah'
-        stale-pr-message: 'Reminder: it has been 3 weeks please merge or close your backport!'
+        stale-issue-message: 'Ignored'
+        stale-pr-message: 'Reminder: it has been 2 weeks please merge or close your backport!'
         stale-issue-label: 'no-backport-issue-activity'
         stale-pr-label: 'no-backport-pr-activity'
         close-issue-label: 'X-stale'
         close-pr-label: 'X-stale'
-        days-before-pr-stale: 21
+        days-before-pr-stale: 14
         # Disable this for issues, by setting a very high bar
         days-before-issue-stale: 99999
         days-before-close: 99999