chore(deps): update dependency system.io.abstractions to v20

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
System.IO.Abstractions	19.2.87 -> 20.0.4

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Release Notes

TestableIO/System.IO.Abstractions (System.IO.Abstractions)

### [`v20.0.4`](https://togithub.com/TestableIO/System.IO.Abstractions/releases/tag/v20.0.4) ##### What's Changed - refactor: update supported frameworks by [@​vbreuss](https://togithub.com/vbreuss) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1060](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1060) - fix(ci): make push step idempotent by [@​fgreinacher](https://togithub.com/fgreinacher) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1062](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1062) - fix: combine ci and release workflows by [@​fgreinacher](https://togithub.com/fgreinacher) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1063](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1063) - fix: use correct release commenter version by [@​fgreinacher](https://togithub.com/fgreinacher) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1064](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1064) **Full Changelog**: https://github.com/TestableIO/System.IO.Abstractions/compare/v19.2.91...v20.0.4 ### [`v19.2.91`](https://togithub.com/TestableIO/System.IO.Abstractions/releases/tag/v19.2.91) ##### What's Changed - chore(deps): update dependency saucecontrol.inheritdoc to v1.4.0 by [@​renovate](https://togithub.com/renovate) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1057](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1057) - chore(deps): update dependency moq to v4.20.70 by [@​renovate](https://togithub.com/renovate) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1059](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1059) - chore(deps): update actions/setup-dotnet action to v4 by [@​renovate](https://togithub.com/renovate) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1061](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1061) - fix: prefix bug in MockDirectory.EnumerateDirectories ([#​815](https://togithub.com/TestableIO/System.IO.Abstractions/issues/815)) by [@​Phoenox](https://togithub.com/Phoenox) in [https://github.com/TestableIO/System.IO.Abstractions/pull/1046](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1046) ##### New Contributors - [@​Phoenox](https://togithub.com/Phoenox) made their first contribution in [https://github.com/TestableIO/System.IO.Abstractions/pull/1046](https://togithub.com/TestableIO/System.IO.Abstractions/pull/1046) **Full Changelog**: https://github.com/TestableIO/System.IO.Abstractions/compare/v19.2.87...v19.2.91

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