chore(deps): update mstest monorepo to 3.8.3 (#331)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/ReactiveMarbles.PropertyChanged.SourceGenerator.Tests/ReactiveMarbles.PropertyChanged.SourceGenerator.Tests.csproj

@@ -13,8 +13,8 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.11.0" PrivateAssets="all" />
     <PackageReference Include="System.Reactive" Version="6.0.1" />
     <PackageReference Include="FluentAssertions" Version="6.2.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.2.2" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.2.2" />    
+    <PackageReference Include="MSTest.TestFramework" Version="3.8.3" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.8.3" />    
   </ItemGroup>
 
   <ItemGroup>