Bump Microsoft.NET.Test.Sdk from 17.7.2 to 17.8.0 (#311)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.7.2 to 17.8.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.7.2...v17.8.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Steve Smith <steve@kentsmiths.com>

test/GuardClauses.UnitTests/GuardClauses.UnitTests.csproj

@@ -17,7 +17,7 @@
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
 
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
         <PackageReference Include="ReportGenerator" Version="5.2.0" />
         <PackageReference Include="xunit" Version="2.6.2" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.5.4" />