Bump xunit from 2.5.3 to 2.6.2

[dependabot[bot]]

Bumps xunit from 2.5.3 to 2.6.2.

Commits

• f69c77d v2.6.2
• 9ef018a Latest dependencies
• dc28c5d Add -silent reporter which does not output anything
• 9cbad9a Unit tests for #2821 (v2)
• e25a79e Missing assemblies for net6.0
• 95954e3 Put net6.0 DLL into xunit.runner.console NuGet package
• 6ec181e Disable warnings about out-of-support versions of .NET Core
• 6d1bc07 Only print max threads when parallel test collections is on
• d300c88 xunit/visualstudio.xunit#392: stopOnFail is ignored when synchronous message ...
• 4e99b52 Use on/off for stop on fail banner display
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #379.