Apply PR review feedback: use config.Model instead of hardcoded model name

Co-authored-by: EngincanV <43685404+EngincanV@users.noreply.github.com>

docs/en/Community-Articles/2026-02-04-Omni-Moderation-in-AI-Management-Module/post.md

@@ -309,7 +309,7 @@ public class ContentModerator : IContentModerator, ITransientDependency
         }
 
         var client = new ModerationClient(
-            model: "omni-moderation-latest",
+            model: config.Model,
             apiKey: config.ApiKey
         );