Bump MSTest from 3.2.2 to 3.3.1

Bumps [MSTest](https://github.com/microsoft/testfx) from 3.2.2 to 3.3.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.2.2...v3.3.1)

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

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

FluentRandomPicker.Tests/FluentRandomPicker.Tests.csproj

@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <!-- MsTest is a meta package and the recommended way to reference all recommended MSTest packages -->
-    <PackageReference Include="MSTest" Version="3.2.2" />
+    <PackageReference Include="MSTest" Version="3.3.1" />
     <PackageReference Include="coverlet.collector" Version="6.0.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>