chore(deps): update actions/stale action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/stale	action	major	v5 -> v6

---

Release Notes

actions/stale

v6

Compare Source

---

Configuration

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

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ 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, click this checkbox.

---

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

[ghost]

👇 Click on the image for a new way to code review

• Make big changes easier — review code in small groups of related files

• Know where to start — see the whole change at a glance

• Take a code tour — explore the change with an interactive tour

• Make comments and review — all fully sync’ed with github

  Try it now!

Legend

[codeclimate]

Code Climate has analyzed commit a15318c and detected 0 issues on this pull request.

View more on Code Climate.