Update dependency xunit.runner.visualstudio to v2.5.7

Author: renovate[bot]

src/Tests/Using.Spectre.Console.Rx.Tests.csproj

@@ -11,7 +11,7 @@
     <PackageReference Include="Shouldly" Version="4.2.1" />
     <PackageReference Include="Verify.Xunit" Version="23.2.0" />
     <PackageReference Include="xunit" Version="2.7.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>