Bump MSTest in /docs/testing/snippets/testing/mstest in the dotnet group (#2013)

Bumps the dotnet group in /docs/testing/snippets/testing/mstest with 1 update: [MSTest](https://github.com/microsoft/testfx).


Updates `MSTest` from 3.6.1 to 3.6.2
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.6.1...v3.6.2)

---
updated-dependencies:
- dependency-name: MSTest
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/testing/snippets/testing/mstest/AspireApp.Tests/AspireApp.Tests.csproj

@@ -15,7 +15,7 @@
 
   <ItemGroup>
     <PackageReference Include="Aspire.Hosting.Testing" Version="8.2.2" />
-    <PackageReference Include="MSTest" Version="3.6.1" />
+    <PackageReference Include="MSTest" Version="3.6.2" />
   </ItemGroup>
 
   <ItemGroup>