[docs] Fix ConversationRequestOptions

packages/docs/src/mdx/docs/conversation/conversation-request-options.mdx

@@ -37,7 +37,7 @@ The options you pass are conveniently the same as the [`toJSON`](#serialization-
         -   `password`: The proxy password.
 
     > A header `Proxy-Authorization` is automatically added to the request with the proxy authentication.
-    > You shouldn't need to add it yourself unless you want to override the default value of "Basic {auth}" where `{auth}` is a base64-encoded string of the `username:password`.
+    > You shouldn't need to add it yourself unless you want to override the default value of "Basic \{auth\}" where `{auth}` is a base64-encoded string of the `username:password`.
 
 ## Serialization and Deserialization