Bump Microsoft.NET.Test.Sdk from 17.14.1 to 18.0.0 (#1079)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="Microsoft.AspNetCore.WebUtilities" Version="2.3.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.PublicApiAnalyzers" Version="4.14.0" />
     <PackageVersion Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageVersion Include="Newtonsoft.Json.Schema" Version="4.0.1" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="Polly.Core" Version="8.5.2" />