add more resources

Author: MQ37

sources/platform/integrations/ai/crewai.md

@@ -205,3 +205,5 @@ print(result)
 
 - [Apify Actors](https://docs.apify.com/platform/actors)
 - [CrewAI Documentation](https://docs.crewai.com/)
+- [What are AI agents?](https://blog.apify.com/what-are-ai-agents/)
+- [How to build an AI agent](https://blog.apify.com/how-to-build-an-ai-agent/)