Update xunit-dotnet monorepo

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
xunit	2.5.1 -> 2.6.1
xunit.runner.visualstudio	2.5.1 -> 2.5.3

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Release Notes

xunit/xunit (xunit)

### [`v2.6.1`](https://togithub.com/xunit/xunit/compare/2.6.0...2.6.1) [Compare Source](https://togithub.com/xunit/xunit/compare/2.6.0...2.6.1) ### [`v2.6.0`](https://togithub.com/xunit/xunit/compare/2.5.3...2.6.0) [Compare Source](https://togithub.com/xunit/xunit/compare/2.5.3...2.6.0) ### [`v2.5.3`](https://togithub.com/xunit/xunit/compare/2.5.2...2.5.3) [Compare Source](https://togithub.com/xunit/xunit/compare/2.5.2...2.5.3) ### [`v2.5.2`](https://togithub.com/xunit/xunit/compare/2.5.1...2.5.2) [Compare Source](https://togithub.com/xunit/xunit/compare/2.5.1...2.5.2)

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

### [`v2.5.3`](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.1...2.5.3) [Compare Source](https://togithub.com/xunit/visualstudio.xunit/compare/2.5.1...2.5.3)

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Configuration

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