MINOR: [C#] Bump Microsoft.NET.Test.Sdk from 17.11.1 to 17.12.0 in /csharp#44838

CurtHagenlocher merged 1 commit intomainapache/arrow:mainfrom

dependabot/nuget/csharp/Microsoft.NET.Test.Sdk-17.12.0apache/arrow:dependabot/nuget/csharp/Microsoft.NET.Test.Sdk-17.12.0Copy head branch name to clipboard