Bump MSTest from 3.11.0 to 4.0.0

---
updated-dependencies:
- dependency-name: MSTest
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Testing/Acceptance/GenHTTP.Testing.Acceptance.csproj

@@ -36,7 +36,7 @@
         <PackageReference Include="Microsoft.OpenApi" Version="2.3.4" />
         <PackageReference Include="Microsoft.OpenApi.YamlReader" Version="2.3.4" />
 
-        <PackageReference Include="MSTest" Version="3.11.0" />
+        <PackageReference Include="MSTest" Version="4.0.0" />
 
         <PackageReference Include="NSubstitute" Version="5.3.0" />