chore(deps): update dependency fluentassertions to 8.7.1

Author: renovate[bot]

src/Camelotia.Tests/Camelotia.Tests.csproj

@@ -8,7 +8,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="FluentAssertions" Version="8.5.0" />
+    <PackageReference Include="FluentAssertions" Version="8.7.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="xunit" Version="2.9.3" />