fix (docs): update save state example (#2276)

content/examples/01-next-app/04-state-management/02-save-and-restore-states.mdx

@@ -7,7 +7,7 @@ description: Learn to save and restore AI and UI states with onGetUIState and on
 
 Sometimes conversations with language models can get interesting and you might want to save the state of so you can revisit it or continue the conversation later.
 
-`createAI` has an experimental callback function called `unstable_onSetAI` that gets called whenever the AI state changes. You can use this to save the AI state to a filename or a database.
+`createAI` has an experimental callback function called `onSetAIState` that gets called whenever the AI state changes. You can use this to save the AI state to a filename or a database.
 
 ## Client
 
@@ -177,14 +177,14 @@ export const AI = createAI<ServerMessage[], ClientMessage[]>({
   actions: {
     continueConversation,
   },
-  unstable_onSetAIState: async ({ state, done }) => {
+  onSetAIState: async ({ state, done }) => {
     'use server';
 
     if (done) {
       saveChat(state);
     }
   },
-  unstable_onGetUIState: async () => {
+  onGetUIState: async () => {
     'use server';
 
     const history: ServerMessage[] = getAIState();