chore(deps): update mstest monorepo to v4

Author: renovate[bot]

src/Directory.Packages.props

@@ -15,8 +15,8 @@
         <PackageVersion Include="NUnit" Version="4.4.0" />
 
         <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
-        <PackageVersion Include="MSTest.TestAdapter" Version="3.11.0" />
-        <PackageVersion Include="MSTest.TestFramework" Version="3.11.0" />
+        <PackageVersion Include="MSTest.TestAdapter" Version="4.0.1" />
+        <PackageVersion Include="MSTest.TestFramework" Version="4.0.1" />
 
         <PackageVersion Include="xunit.assert" Version="2.9.3" />
         <PackageVersion Include="xunit" Version="2.9.3" />