Update dependency xunit.runner.visualstudio to 3.1.1 (#779)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/Soenneker.Utils.AsyncSingleton.Tests/Soenneker.Utils.AsyncSingleton.Tests.csproj

@@ -8,7 +8,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
-        <PackageReference Include="xunit.runner.visualstudio" Version="3.1.0">
+        <PackageReference Include="xunit.runner.visualstudio" Version="3.1.1">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>