Update function-calling.mdx

Author: humford

fern/assistants/function-calling.mdx

@@ -25,7 +25,7 @@ This function is provided when `transferCall` is included in the assistant's lis
     ],
     "tools": [
       {
-          "type": "transferCall".
+          "type": "transferCall",
           "destinations" : {
             {
               "type": "number",
@@ -129,4 +129,4 @@ At the assistant level, the `serverUrl` can be specified in the assistant config
 If the `serverUrl` is not defined either at the account level or the assistant level, the function call will simply be added to the chat history. This can be particularly useful when you want a function call to trigger an action on the frontend.
 
 For instance, the frontend can listen for specific function calls in the chat history and respond by updating the user interface or performing other actions. This allows for a dynamic and interactive user experience, where the frontend can react to changes in the conversation in real time.
-</Accordion>
+</Accordion>