Update xunit-dotnet monorepo to v2.5.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
xunit	nuget	minor	2.4.2 -> 2.5.1
xunit.runner.visualstudio (source)	nuget	minor	2.4.5 -> 2.5.1

---

Release Notes

xunit/xunit (xunit)

### [`v2.5.1`](https://togithub.com/xunit/xunit/compare/2.5.0...2.5.1) [Compare Source](https://togithub.com/xunit/xunit/compare/2.5.0...2.5.1) ### [`v2.5.0`](https://togithub.com/xunit/xunit/compare/2.4.2...2.5.0) [Compare Source](https://togithub.com/xunit/xunit/compare/2.4.2...2.5.0)

---

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 these updates 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.