Bump Microsoft.NET.Test.Sdk from 16.6.0 to 16.6.1

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.6.0 to 16.6.1.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v16.6.0...v16.6.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

src/Directory.Build.props

@@ -25,7 +25,7 @@
         <PackageVersion_MicrosoftExtensions>3.0.0</PackageVersion_MicrosoftExtensions>
         <PackageVersion_MsBuild>16.5.0</PackageVersion_MsBuild>
 
-        <PackageVersion_MicrosoftTestSdk>16.6.0</PackageVersion_MicrosoftTestSdk>
+        <PackageVersion_MicrosoftTestSdk>16.6.1</PackageVersion_MicrosoftTestSdk>
         <PackageVersion_NSubstitute>4.2.1</PackageVersion_NSubstitute>
         <PackageVersion_CoverletMsBuild>2.8.1</PackageVersion_CoverletMsBuild>
         <PackageVersion_NUnit>3.12.0</PackageVersion_NUnit>