chore: Bump the dependencies group with 1 update

Bumps Mecha.xUnit from 3.2.8 to 3.2.9

---
updated-dependencies:
- dependency-name: Mecha.xUnit
  dependency-version: 3.2.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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

Author: dependabot[bot]

ObjectCartographer.Tests/ObjectCartographer.Tests.csproj

@@ -11,7 +11,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Mecha.xUnit" Version="3.2.8" />
+    <PackageReference Include="Mecha.xUnit" Version="3.2.9" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">