Adding Swarm integration to the list of integrations (#1845)

Author: sahusiddharth

docs/howtos/integrations/index.md

@@ -10,6 +10,7 @@ happy to look into it 🙂
 
 - [Langchain](./langchain.md) - Langchain is a framework for building LLM applications, more information can be found [here](https://www.langchain.com/).
 - [LlamaIndex](./_llamaindex.md) - LlamaIndex is a framework for building RAG applications, more information can be found [here](https://www.llamaindex.ai/).
+- [Swarm](./swarm_agent_evaluation.md) - Swarm is a framework for orchestrating multiple AI agents, more information can be found [here](https://github.com/openai/swarm).
 
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