chore(deps): update dependency fluentassertions to 8.9.0 (#1724)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Directory.Packages.props

@@ -39,7 +39,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="xunit" Version="2.9.3" />
-    <PackageVersion Include="FluentAssertions" Version="8.8.0" />
+    <PackageVersion Include="FluentAssertions" Version="8.9.0" />
     <PackageVersion Include="Verify.Xunit" Version="31.12.5" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.5.0" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />