Bump Microsoft.NET.Test.Sdk in /csharp/unit-testing/NUnit.TestProject

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.7.1 to 17.7.2.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.7.1...v17.7.2)

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

Signed-off-by: dependabot[bot] <support@github.com>

csharp/unit-testing/NUnit.TestProject/NUnit.Project.csproj

@@ -9,7 +9,7 @@
   <ItemGroup>
     <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
   </ItemGroup>
 
 </Project>