chore(deps): update actions/stale action to v9

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
actions/stale	action	major	v8 -> v9

---

Release Notes

actions/stale (actions/stale)

v9

Compare Source

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.