build(deps): bump FluentAssertions from 6.5.0 to 6.5.1 in /src (#3185)

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.5.0 to 6.5.1.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/develop/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@6.5.0...6.5.1)

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

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