build(deps): bump FluentAssertions from 6.0.0 to 6.1.0 in /src (#2900)

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.0.0 to 6.1.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/master/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@6.0.0...6.1.0)

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

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Author: dependabot[bot]