docs: document Desktop UI recipe editing for model/provider and extensions

documentation/src/components/RecipeFields.js

@@ -6,9 +6,15 @@ const RecipeFields = () => {
       <li><strong>Title</strong> and <strong>description</strong></li>
       <li><strong>Instructions</strong> that tell goose what to do</li>
       <li><strong>Initial prompt</strong> to pre-fill the chat input</li>
-      <li><strong>Message</strong> to display at the top of the recipe and <strong>activity buttons</strong> for users to click</li>
-      <li><strong>Parameters</strong> to accept dynamic values</li>
-      <li><strong>Response JSON schema</strong> for <a href="/goose/docs/guides/recipes/session-recipes#structured-output-for-automation">structured output in automations</a></li>
+      <li><strong>Advanced Options</strong> (expand to access):
+        <ul>
+          <li><strong>Activities</strong> to display as clickable buttons for users</li>
+          <li><strong>Parameters</strong> to accept dynamic values</li>
+          <li><strong>Model and provider</strong> to specify which provider and model the recipe should use</li>
+          <li><strong>Extensions</strong> to select which tools are available</li>
+          <li><strong>Response JSON schema</strong> for <a href="/goose/docs/guides/recipes/session-recipes#structured-output-for-automation">structured output in automations</a></li>
+        </ul>
+      </li>
     </ul>
   );
 };