Bump FluentAssertions from 7.0.0 to 8.0.0 in the testing group

Bumps the testing group with 1 update: [FluentAssertions](https://github.com/fluentassertions/fluentassertions).


Updates `FluentAssertions` from 7.0.0 to 8.0.0
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/develop/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@7.0.0...8.0.0)

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

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

Tests/Bones.Testing.Shared/Bones.Testing.Shared.csproj

@@ -13,7 +13,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="FluentAssertions" Version="7.0.0" />
+        <PackageReference Include="FluentAssertions" Version="8.0.0" />
     </ItemGroup>
 
     <ItemGroup>