Update publishing-to-postman.mdx

Author: chdeskur

fern/products/sdks/overview/postman/publishing-to-postman.mdx

@@ -10,7 +10,7 @@ Publish your Postman collection directly to Postman workspaces, making it easy f
 To publish your collection directly to Postman, configure the output and specify the name of your collection:
 
 ```yaml title="generators.yml" {6-9}
-generators:
+groups:
   postman:
     generators:
       - name: fernapi/fern-postman