chore(deps): update actions/stale action to v5.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/stale	action	minor	v5.0.0 -> v5.1.0

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Release Notes

actions/stale

### [`v5.1.0`](https://togithub.com/actions/stale/releases/tag/v5.1.0) [Compare Source](https://togithub.com/actions/stale/compare/v5.0.0...v5.1.0) ### \[5.1.0] [Don't process stale issues right after they're marked stale](https://togithub.com/actions/stale/issues/696) Add close-issue-reason option [#​764](https://togithub.com/actions/stale/pull/764)[#​772](https://togithub.com/actions/stale/pull/772) Various dependabot/dependency updates

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Configuration

📅 Schedule: Branch creation - "after 10pm every weekday,before 5am every weekday,every weekend" in timezone Europe/Berlin, Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, 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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