Fix quote chars in stale.yml

Author: Felix Exner

.github/workflows/stale.yml

@@ -21,13 +21,13 @@ jobs:
       - uses: actions/stale@v7
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          stale-issue-message: 'This issue has not been updated for a long time. If no further updates are added, this will be closed automatically. Comment on the issue to prevent automatic closing.'
-          stale-pr-message: 'This PR hasn't made any progress for quite some time and will be closed soon. Please comment if it is still relevant.'
-          stale-issue-label: 'close if no update'
-          exempt-issue-labels: 'bug,documentation,PR Pending,enhancement,ToDo, help wanted, waiting_for_sync'
+          stale-issue-message: "This issue has not been updated for a long time. If no further updates are added, this will be closed automatically. Comment on the issue to prevent automatic closing."
+          stale-pr-message: "This PR hasn't made any progress for quite some time and will be closed soon. Please comment if it is still relevant."
+          stale-issue-label: "close if no update"
+          exempt-issue-labels: "bug,documentation,PR Pending,enhancement,ToDo, help wanted, waiting_for_sync"
           days-before-stale: 90
           days-before-close: -1
           days-before-issue-close: 30
-          close-issue-message: 'This issue has been closed due to inactivity. Feel free to comment or reopen if this is still relevant.'
+          close-issue-message: "This issue has been closed due to inactivity. Feel free to comment or reopen if this is still relevant."
           #debug-only: true
           remove-stale-when-updated: true