Update Stale action message (GH-23791)

We don't close PRs after it becomes stale.

.github/workflows/stale.yml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/stale@v3
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-pr-message: 'This PR is stale because it has been open for 30 days with no activity. Remove stale label or comment or this will be closed in 5 days'
+        stale-pr-message: 'This PR is stale because it has been open for 30 days with no activity.'
         stale-pr-label: 'stale'
         days-before-stale: 30
         days-before-close: -1