chore(deps): update dependency microsoft.net.test.sdk to v18 (#917)

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

Author: renovate[bot]

src/KubernetesCRDModelGen.Tests/KubernetesCRDModelGen.Tests.csproj

@@ -11,7 +11,7 @@
         <PackageReference Include="FluentAssertions" Version="7.2.0" />
         <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.0-rc.1.25451.107" />
         <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.0-rc.1.25451.107" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
         <PackageReference Include="xunit" Version="2.9.3" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>