Update actions/stale action to v6 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/stale	action	major	v3 -> v6

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Release Notes

actions/stale

### [`v6`](https://togithub.com/actions/stale/compare/v5...v6) [Compare Source](https://togithub.com/actions/stale/compare/v5...v6) ### [`v5`](https://togithub.com/actions/stale/compare/v4...v5) [Compare Source](https://togithub.com/actions/stale/compare/v4...v5) ### [`v4`](https://togithub.com/actions/stale/compare/v3...v4) [Compare Source](https://togithub.com/actions/stale/compare/v3...v4)

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Configuration

📅 Schedule: Branch creation - "before 7am every weekday" in timezone Europe/Brussels, 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.

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• [ ] If you want to rebase/retry this PR, click this checkbox.

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

[coveralls]

Pull Request Test Coverage Report for Build 3102664548

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 2911813325:	0.0%
Covered Lines:	1362
Relevant Lines:	1362

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 3102664548

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 2911813325:	0.0%
Covered Lines:	1362
Relevant Lines:	1362

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 3102664548

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 2911813325:	0.0%
Covered Lines:	1362
Relevant Lines:	1362

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💛 - Coveralls