GitHub Action: Bump actions/stale from 8 to 9

Bumps [actions/stale](https://github.com/actions/stale) from 8 to 9.
- [Release notes](https://github.com/actions/stale/releases)
- [Changelog](https://github.com/actions/stale/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/stale/compare/v8...v9)

---
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.yml

diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index b9160b5..8d93d27 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -27,7 +27,7 @@
 

     steps:

     - name: Check for Stale Items

-      uses: actions/stale@v8

+      uses: actions/stale@v9

       with:

         days-before-issue-close: -1

         days-before-issue-stale: -1