Bump FluentAssertions from 6.9.0 to 8.0.0

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.9.0 to 8.0.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/main/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@6.9.0...8.0.0)

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

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

Author: dependabot[bot]

Tests/Tests.csproj

@@ -25,7 +25,7 @@
     <PackageReference Include="Newtonsoft.Json">
       <Version>13.0.2</Version>
     </PackageReference>
-    <PackageReference Include="FluentAssertions" Version="6.9.0" />
+    <PackageReference Include="FluentAssertions" Version="8.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.0.2" />
     <PackageReference Include="MSTest.TestFramework" Version="3.0.2" />