Bump Microsoft.NET.Test.Sdk from 16.7.1 to 16.8.0 (petabridge#366)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.7.1 to 16.8.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v16.7.1...v16.8.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

src/common.props

@@ -30,7 +30,7 @@ For a full set of changes, [please see the NBench 2.0.1 milestone on Github](htt
   <PropertyGroup>
     <ApprovalTestsVersion>5.4.2</ApprovalTestsVersion>
     <XunitVersion>2.4.1</XunitVersion>
-    <TestSdkVersion>16.7.1</TestSdkVersion>
+    <TestSdkVersion>16.8.0</TestSdkVersion>
     <FluentAssertionsVersion>5.10.2</FluentAssertionsVersion>
   </PropertyGroup>
   <PropertyGroup>