Update Microsoft.NET.Test.Sdk requirement from 17.6.* to 17.7.*

Updates the requirements on [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) to permit the latest version.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.6.0...v17.7.2)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Directory.Build.props

@@ -40,6 +40,6 @@
     <CoverletVersion>6.0.*</CoverletVersion>
     <GitHubActionsTestLoggerVersion>2.3.*</GitHubActionsTestLoggerVersion>
     <MoqVersion>4.18.*</MoqVersion>
-    <TestSdkVersion>17.6.*</TestSdkVersion>
+    <TestSdkVersion>17.7.*</TestSdkVersion>
   </PropertyGroup>
 </Project>