build(deps): bump FluentAssertions from 6.12.0 to 6.12.1

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.12.0 to 6.12.1.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/develop/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@6.12.0...6.12.1)

---
updated-dependencies:
- dependency-name: FluentAssertions
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Directory.Packages.props

@@ -13,7 +13,7 @@
         <PackageVersion Include="AutoMapper" Version="10.1.1" />
         <PackageVersion Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="8.1.1" />
         <PackageVersion Include="coverlet.collector" Version="6.0.2" />
-        <PackageVersion Include="FluentAssertions" Version="6.12.0" />
+        <PackageVersion Include="FluentAssertions" Version="6.12.1" />
         <PackageVersion Include="Microsoft.Build" Version="17.3.2" />
         <PackageVersion Include="Microsoft.Build.Framework" Version="17.10.4" />
         <PackageVersion Include="Microsoft.Build.Locator" Version="1.7.8" />