chore(deps): update dependency fluentassertions to 6.12.1

Author: renovate[bot]

Directory.Packages.props

@@ -17,7 +17,7 @@
     <PackageVersion Include="BenchmarkDotNet" Version="0.14.0" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.2" />
-    <PackageVersion Include="FluentAssertions" Version="6.12.0" />
+    <PackageVersion Include="FluentAssertions" Version="6.12.1" />
     <PackageVersion Include="GitHubActionsTestLogger" Version="2.4.1" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
     <PackageVersion Include="NSubstitute" Version="5.1.0" />