Bump FluentAssertions from 5.10.3 to 6.1.0 (#76)

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 5.10.3 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@5.10.3...6.1.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Akka.MultiNode.TestAdapter.Tests/Internal/ResultSummaryTests.cs

@@ -78,7 +78,7 @@ public void ResultsSummaryOutcome(UnitTest[] tests, TestOutcome outcome)
         {
             var summary = new ResultSummary(tests, new Output());
 
-            summary.Outcome.Should().BeEquivalentTo(outcome);
+            summary.Outcome.Should().Be(outcome);
         }
     }
 }

src/common.props

@@ -22,7 +22,7 @@
     <NetCoreTestVersion>netcoreapp3.1</NetCoreTestVersion>
     <NetTestVersion>net5.0</NetTestVersion>
     <NetStandardLibVersion>netstandard2.0</NetStandardLibVersion>
-    <FluentAssertionsVersion>5.10.3</FluentAssertionsVersion>
+    <FluentAssertionsVersion>6.1.0</FluentAssertionsVersion>
     <FsCheckVersion>2.9.0</FsCheckVersion>
     <AkkaVersion>1.4.26</AkkaVersion>
     <AkkaPackageTags>akka;actors;actor model;Akka;concurrency</AkkaPackageTags>