Polly.Core nuget package upgrade 8.6.5 -> 8.6.6

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: stidsborg

Samples/Cleipnir.Sample.Presentation.AspNet/Cleipnir.Sample.Presentation.AspNet.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.5" />
-    <PackageReference Include="Polly.Core" Version="8.6.5" />
+    <PackageReference Include="Polly.Core" Version="8.6.6" />
     <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="10.1.5" />
   </ItemGroup>