chore(deps): update dependency microsoft.net.test.sdk to 17.12.0

Author: renovate[bot]

tests/Prometheus.Client.HttpClient.Tests/Prometheus.Client.HttpClient.Tests.csproj

@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="Fennel" Version="0.3.0" />
     <PackageReference Include="FluentAssertions" Version="6.12.2" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">