Update mstest monorepo to 4.2.1

Author: renovate-bot

src/Radical.Windows.Tests/Radical.Windows.Tests.csproj

@@ -9,8 +9,8 @@
     <PackageReference Include="ApprovalTests" Version="7.0.0" NoWarn="NU1701" />
     <PackageReference Include="FakeItEasy" Version="9.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
-    <PackageReference Include="MSTest.TestAdapter" Version="4.1.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="4.1.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="4.2.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="4.2.1" />
     <PackageReference Include="PublicApiGenerator" Version="11.5.4" />
     <PackageReference Include="SharpTestsEx" Version="2.0.0" />
     <PackageReference Include="coverlet.msbuild" Version="8.0.1">