Update MSTest version (#45498)

Author: Youssef1313

docs/core/testing/unit-testing-with-mstest.md

@@ -65,8 +65,7 @@ Make the *PrimeService.Tests* directory the current directory and create a new p
 
 ```xml
 <ItemGroup>
-  <PackageReference Include="MSTest" Version="3.2.0" />
-  <PackageReference Include="Microsoft.Testing.Extensions.CodeCoverage" Version="17.10.1" />
+  <PackageReference Include="MSTest" Version="3.8.3" />
 </ItemGroup>
 ```