chore(deps): bump actions/stale from 7 to 8

Bumps [actions/stale](https://github.com/actions/stale) from 7 to 8.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](actions/stale@v7...v8)

---
updated-dependencies:
- dependency-name: actions/stale
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/stale-issues-pr.yml

@@ -13,7 +13,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/stale@v7
+      - uses: actions/stale@v8
         with:
           operations-per-run: 250
           stale-issue-message: 'This issue is stale because it has been open 60 days with no activity.'

.github/workflows/waiting-issues.yml

@@ -13,7 +13,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/stale@v7
+      - uses: actions/stale@v8
         with:
           operations-per-run: 250
           stale-issue-message: 'This issue is stale because it has awaiting-response label for 5 days with no activity. Remove stale label or comment or this will be closed in 5 days.'