Update cerebras.mdx

Author: daisyfaithauma

src/content/docs/ai-gateway/providers/cerebras.mdx

@@ -25,7 +25,7 @@ When making requests to Cerebras, ensure you have the following:
 ### cURL
 
 ```bash title="Example fetch request"
-curl -X POST https://gateway.ai.cloudflare.com/v1/ACCOUNT_TAG/GATEWAY/cerebras/chat/completions \
+curl https://gateway.ai.cloudflare.com/v1/ACCOUNT_TAG/GATEWAY/cerebras/chat/completions \
  --header 'content-type: application/json' \
  --header 'Authorization: Bearer CEREBRAS_TOKEN' \
  --data '{