Update dependency FluentAssertions to 6.12.2

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
FluentAssertions (source)	nuget	patch	6.12.1 -> 6.12.2

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Release Notes

fluentassertions/fluentassertions (FluentAssertions)

### [`v6.12.2`](https://redirect.github.com/fluentassertions/fluentassertions/releases/tag/6.12.2) [Compare Source](https://redirect.github.com/fluentassertions/fluentassertions/compare/6.12.1...6.12.2) #### What's Changed ##### Others - Better support for default interface and explicitly implemented properties by [@​dennisdoomen](https://redirect.github.com/dennisdoomen) in [https://github.com/fluentassertions/fluentassertions/pull/2794](https://redirect.github.com/fluentassertions/fluentassertions/pull/2794) **Full Changelog**: https://github.com/fluentassertions/fluentassertions/compare/6.12.1...6.12.2

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