Bump Microsoft.NET.Test.Sdk in the microsoft group (#221)

Author: dependabot[bot]

Tingle.AzureCleaner.Tests/Tingle.AzureCleaner.Tests.csproj

@@ -12,7 +12,7 @@
   <ItemGroup>
     <PackageReference Include="MartinCostello.Logging.XUnit" Version="0.4.0" />
     <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.11" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" PrivateAssets="All" />
     <PackageReference Include="coverlet.collector" Version="6.0.2" PrivateAssets="All" />