chore(deps): bump MSTest.TestAdapter from 3.6.3 to 3.6.4 (#543)

Author: dependabot[bot]

Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="coverlet.msbuild" Version="6.0.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageVersion Include="Microsoft.TestPlatform.TestHost" Version="17.12.0" />
-    <PackageVersion Include="MSTest.TestAdapter" Version="3.6.3" />
+    <PackageVersion Include="MSTest.TestAdapter" Version="3.6.4" />
     <PackageVersion Include="MSTest.TestFramework" Version="3.6.3" />
     <PackageVersion Include="NUnit" Version="4.2.2" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />