fix: broken prereq links

Author: goosewin

fern/chat/non-streaming.mdx

@@ -15,7 +15,7 @@ Build a chat integration that receives complete responses after processing, perf
 
 ## Prerequisites
 
-* Completed [Chat quickstart](/docs/chat/quickstart) tutorial
+* Completed [Chat quickstart](/chat/quickstart) tutorial
 * Understanding of basic HTTP requests and JSON handling
 * Familiarity with JavaScript/TypeScript promises or async/await
 

fern/chat/openai-compatibility.mdx

@@ -16,7 +16,7 @@ Migrate your existing OpenAI chat applications to Vapi without changing a single
 
 ## Prerequisites
 
-* Completed [Chat quickstart](/docs/chat/quickstart) tutorial
+* Completed [Chat quickstart](/chat/quickstart) tutorial
 * Existing OpenAI integration or familiarity with OpenAI SDK
 
 ## Scenario

fern/chat/streaming.mdx

@@ -15,7 +15,7 @@ Build a real-time chat interface that displays responses as they're generated, c
 
 ## Prerequisites
 
-* Completed [Chat quickstart](/docs/chat/quickstart) tutorial
+* Completed [Chat quickstart](/chat/quickstart) tutorial
 * Basic knowledge of TypeScript/JavaScript and async/await
 
 ## Scenario