Bump the microsoft group with 1 update (#981)

Bumps the microsoft group with 1 update: [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest).


Updates `Microsoft.NET.Test.Sdk` from 17.8.0 to 17.9.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.8.0...v17.9.0)

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

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

Author: dependabot[bot]

server/Tingle.Dependabot.Tests/Tingle.Dependabot.Tests.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="MartinCostello.Logging.XUnit" Version="0.3.0" />
     <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.1" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="8.0.1" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="xunit" Version="2.6.6" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6" PrivateAssets="All" />
   </ItemGroup>