chore(site): fix timeout in next examples

Author: NathanFlurry

site/src/content/docs/actors/quickstart/next-js.mdx

@@ -54,6 +54,8 @@ Create a file at `src/app/api/rivet/[...all]/route.ts` to setup the API routes:
 import { toNextHandler } from "@rivetkit/next-js";
 import { registry } from "@/rivet/registry";
 
+export const maxDuration = 300;
+
 export const { GET, POST, PUT, PATCH, HEAD, OPTIONS } = toNextHandler(registry);
 ```
 

site/src/content/docs/integrations/next-js.mdx

@@ -57,6 +57,8 @@ export const registry = setup({
 import { toNextHandler } from "@rivetkit/next-js";
 import { registry } from "@/rivet/registry";
 
+export const maxDuration = 300;
+
 // Export the Next.js handler for the API routes
 export const { GET, POST, HEAD, PATCH, OPTIONS } = toNextHandler(registry);
 ```
@@ -84,6 +86,8 @@ const registry = setup({
 	use: { counter },
 });
 
+export const maxDuration = 300;
+
 export const { GET, POST, HEAD, PATCH, OPTIONS } = toNextHandler(registry);
 ```