NuGet(deps): Bump FluentAssertions from 6.2.0 to 6.5.1

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.2.0 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@6.2.0...6.5.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tests/PowerUtils.Net.Primitives.Tests/2.PowerUtils.Net.Primitives.Tests.csproj

@@ -20,7 +20,7 @@
 
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.2.0" />
+    <PackageReference Include="FluentAssertions" Version="6.5.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">