Bump Microsoft.NET.Test.Sdk in /tests/Atrea.PolicyEngine.Tests

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.2.0 to 17.3.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v17.2.0...v17.3.0)

---
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>

tests/Atrea.PolicyEngine.Tests/Atrea.PolicyEngine.Tests.csproj

@@ -20,7 +20,7 @@
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
 		<PackageReference Include="FluentAssertions" Version="6.7.0" />
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.0" />
 		<PackageReference Include="NSubstitute" Version="4.4.0" />
 		<PackageReference Include="NSubstitute.Analyzers.CSharp" Version="1.0.15">
 		  <PrivateAssets>all</PrivateAssets>