Bump FluentAssertions from 6.12.0 to 6.12.1

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.12.0 to 6.12.1.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/develop/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@6.12.0...6.12.1)

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

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

Author: dependabot[bot]

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

@@ -18,7 +18,7 @@
         <PackageReference Include="coverlet.collector" Version="6.0.2" PrivateAssets="all" />
         <PackageReference Include="coverlet.msbuild" Version="6.0.2" PrivateAssets="all" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
-        <PackageReference Include="FluentAssertions" Version="6.12.0" />
+        <PackageReference Include="FluentAssertions" Version="6.12.1" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
         <PackageReference Include="SharpYaml" Version="2.1.1" />
         <PackageReference Include="xunit" Version="2.9.0" />

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

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.2" PrivateAssets="all" />
     <PackageReference Include="coverlet.msbuild" Version="6.0.2" PrivateAssets="all" />
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="FluentAssertions" Version="6.12.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />