Bump the dotnet group across 1 directory with 3 updates

Bumps the dotnet group with 3 updates in the /docs/core/testing/snippets/order-unit-tests/csharp directory: [MSTest.TestAdapter](https://github.com/microsoft/testfx), [MSTest.TestFramework](https://github.com/microsoft/testfx) and [xunit](https://github.com/xunit/xunit).


Updates `MSTest.TestAdapter` from 3.5.2 to 3.6.1
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.5.2...v3.6.1)

Updates `MSTest.TestFramework` from 3.5.2 to 3.6.1
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.5.2...v3.6.1)

Updates `xunit` from 2.9.0 to 2.9.2
- [Commits](xunit/xunit@v2-2.9.0...v2-2.9.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

docs/core/testing/snippets/order-unit-tests/csharp/MSTest.Project/MSTest.Project.csproj

@@ -9,8 +9,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.5.2" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.5.2" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.6.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.6.1" />
     <PackageReference Include="coverlet.collector" Version="6.0.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

docs/core/testing/snippets/order-unit-tests/csharp/XUnit.TestProject/XUnit.Project.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
-    <PackageReference Include="xunit" Version="2.9.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>