chore(deps): update xunit-dotnet monorepo to v2.8.0

Author: renovate[bot]

Doppler.HelloMicroservice.Test/Doppler.HelloMicroservice.Test.csproj

@@ -10,8 +10,8 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="7.0.8" />
     <PackageReference Include="Moq" Version="4.20.70" />
-    <PackageReference Include="xunit" Version="2.7.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.8">
+    <PackageReference Include="xunit" Version="2.8.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>