Bump Microsoft.NET.Test.Sdk from 17.5.0 to 17.6.0 (#231)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.5.0 to 17.6.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.5.0...v17.6.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/common.props

@@ -14,7 +14,7 @@
   <PropertyGroup>
     <XunitVersion>2.4.2</XunitVersion>
     <XunitRunnerVersion>2.4.5</XunitRunnerVersion>
-    <TestSdkVersion>17.5.0</TestSdkVersion>
+    <TestSdkVersion>17.6.0</TestSdkVersion>
     <NBenchVersion>2.0.1</NBenchVersion>
     <AkkaVersion>1.5.6</AkkaVersion>
     <NetCoreTestVersion>netcoreapp3.1</NetCoreTestVersion>