(maint) Update xunit-dotnet monorepo

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
xunit	2.7.0 -> 2.8.0
xunit.analyzers	1.11.0 -> 1.13.0
xunit.runner.visualstudio	2.5.7 -> 2.8.0

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Release Notes

xunit/xunit (xunit)

### [`v2.8.0`](https://togithub.com/xunit/xunit/compare/2.7.1...2.8.0) [Compare Source](https://togithub.com/xunit/xunit/compare/2.7.1...2.8.0) ### [`v2.7.1`](https://togithub.com/xunit/xunit/compare/2.7.0...2.7.1) [Compare Source](https://togithub.com/xunit/xunit/compare/2.7.0...2.7.1)

xunit/xunit.analyzers (xunit.analyzers)

### [`v1.13.0`](https://togithub.com/xunit/xunit.analyzers/compare/1.12.0...1.13.0) [Compare Source](https://togithub.com/xunit/xunit.analyzers/compare/1.12.0...1.13.0) ### [`v1.12.0`](https://togithub.com/xunit/xunit.analyzers/compare/1.11.0...1.12.0) [Compare Source](https://togithub.com/xunit/xunit.analyzers/compare/1.11.0...1.12.0)

xunit/visualstudio.xunit (xunit.runner.visualstudio)

### [`v2.8.0`](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.8...2.8.0) [Compare Source](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.8...2.8.0) ### [`v2.5.8`](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.7...2.5.8) [Compare Source](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.7...2.5.8)

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