Bump FluentAssertions from 5.10.3 to 6.2.0

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 5.10.3 to 6.2.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/master/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@5.10.3...6.2.0)

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

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

Author: dependabot[bot]

test/Microsoft.OpenApi.Readers.Tests/Microsoft.OpenApi.Readers.Tests.csproj

@@ -243,7 +243,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-        <PackageReference Include="FluentAssertions" Version="5.10.3">
+        <PackageReference Include="FluentAssertions" Version="6.2.0">
         </PackageReference>
         <PackageReference Include="Newtonsoft.Json" Version="13.0.1">
         </PackageReference>

test/Microsoft.OpenApi.Tests/Microsoft.OpenApi.Tests.csproj

@@ -16,7 +16,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="FluentAssertions" Version="5.10.3" />
+    <PackageReference Include="FluentAssertions" Version="6.2.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="SharpYaml" Version="1.6.6" />
     <PackageReference Include="xunit" Version="2.4.1" />