update stale.yml

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/workflows/stale.yml

@@ -10,8 +10,8 @@ jobs:
     - uses: actions/stale@v1
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove Stale label or comment or this will be closed in 5 days.'
-        stale-pr-message: 'This pull request is stale because it has been open 30 days with no activity. Remove Stale label or comment or this will be closed in 5 days.'
+        stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
+        stale-pr-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
         days-before-stale: 30
         days-before-close: 5
-        exempt-issue-label: ['documentation', 'tutorial']
+        exempt-issue-label: 'documentation,tutorial'