chore(deps): update dependency fluentassertions to 8.7.0

Author: renovate[bot]

Directory.Packages.props

@@ -39,7 +39,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.4" />
     <PackageVersion Include="xunit" Version="2.9.3" />
-    <PackageVersion Include="FluentAssertions" Version="8.6.0" />
+    <PackageVersion Include="FluentAssertions" Version="8.7.0" />
     <PackageVersion Include="Verify.Xunit" Version="30.18.0" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.5.0" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />