Bump FluentAssertions from 6.5.1 to 6.6.0 (#235)

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.5.1 to 6.6.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/develop/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@6.5.1...6.6.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -4,7 +4,7 @@
 		<PackageVersion  Include="D2L.CodeStyle.Analyzers" Version="0.188.0" />
 		<PackageVersion  Include="D2L.CodeStyle.Annotations" Version="0.31.0" />
 		<PackageVersion  Include="D2L.Services.Core.Exceptions" Version="2.0.1.15" />
-		<PackageVersion  Include="FluentAssertions" Version="6.5.1" />
+		<PackageVersion  Include="FluentAssertions" Version="6.6.0" />
 		<PackageVersion  Include="Microsoft.AspNet.WebApi.Core" Version="5.2.7" />
 		<PackageVersion  Include="Microsoft.AspNet.WebApi.OwinSelfHost" Version="5.2.7" />
 		<PackageVersion  Include="Microsoft.Extensions.Caching.Memory" Version="6.0.1" />