chore: Bump Microsoft.Testing.Platform.MSBuild to 2.2.3 in Directory.Packages.props

Author: glennawatson

src/Directory.Packages.props

@@ -31,7 +31,7 @@
     <PackageVersion Include="Microsoft.Extensions.DependencyModel" Version="10.0.5"/>
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.5.1"/>
     <PackageVersion Include="Microsoft.Testing.Extensions.CodeCoverage" Version="18.7.0"/>
-    <PackageVersion Include="Microsoft.Testing.Platform.MSBuild" Version="2.1.0"/>
+    <PackageVersion Include="Microsoft.Testing.Platform.MSBuild" Version="2.2.3"/>
     <PackageVersion Include="Microsoft.Reactive.Testing" Version="6.1.0"/>
     <PackageVersion Include="System.Reactive" Version="6.1.0"/>
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.300"/>