fix typo

Author: hackthehackerman

fern/calls/call-features.mdx

@@ -17,7 +17,7 @@ To initiate a call and retrieve the `listenUrl` and `controlUrl`, send a POST re
 ### Sample Request
 
 ```bash
-curl 'https://api.vapi.ai/call/phone' 
+curl 'https://api.vapi.ai/call' 
 -H 'authorization: Bearer YOUR_API_KEY' 
 -H 'content-type: application/json' 
 --data-raw '{