Bump FluentAssertions from 7.2.2 to 8.9.0#5

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dependabot/nuget/src/Grattlersoft.VsExtension.Core.Tests/FluentAssertions-8.9.0grattlersoft/lib-dotnet:dependabot/nuget/src/Grattlersoft.VsExtension.Core.Tests/FluentAssertions-8.9.0Copy head branch name to clipboard