fix: broken links in next steps

Author: goosewin

fern/chat/non-streaming.mdx

@@ -320,7 +320,7 @@ Enhance your non-streaming chat system further:
 * **[Add streaming capabilities](/chat/streaming)** - Upgrade to real-time responses for better UX
 * **[OpenAI compatibility](/chat/openai-compatibility)** - Use familiar OpenAI SDK patterns  
 * **[Integrate tools](/tools)** - Enable your assistant to call external APIs and databases
-* **[Add voice capabilities](/calls/call-outbound)** - Extend your text chat to voice interactions
+* **[Add voice capabilities](/calls/outbound-calling)** - Extend your text chat to voice interactions
 
 <Callout>
 Need help? Chat with the team on our [Discord](https://discord.com/invite/pUFNcf2WmH) or mention us on [X/Twitter](https://x.com/Vapi_AI).

fern/chat/openai-compatibility.mdx

@@ -583,7 +583,7 @@ We'll migrate "TechFlow's" existing OpenAI-powered customer support chat to use
 Enhance your migrated system:
 
 * **[Explore Vapi-specific features](/chat/quickstart)** - Leverage advanced assistant capabilities
-* **[Add voice capabilities](/calls/call-outbound)** - Extend beyond text to voice interactions
+* **[Add voice capabilities](/calls/outbound-calling)** - Extend beyond text to voice interactions
 * **[Integrate tools](/tools/custom-tools)** - Give your assistant access to external APIs
 * **[Optimize for streaming](/chat/streaming)** - Improve real-time user experience