Bump FluentAssertions from 5.4.1 to 5.9.0 (#18)

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 5.4.1 to 5.9.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Commits](fluentassertions/fluentassertions@5.4.1...5.9.0)

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

src/Petabridge.Tracing.ApplicationInsights.Tests/Petabridge.Tracing.ApplicationInsights.Tests.csproj

@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="5.4.1" />
+    <PackageReference Include="FluentAssertions" Version="5.9.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
     <DotNetCliToolReference Include="dotnet-xunit" Version="$(XunitVersion)" />