fix: fixed schema example

Author: DPende

scrapegraph-js/examples/schema_smartScraper_example.js

@@ -6,11 +6,15 @@ const apiKey = process.env.SGAI_APIKEY;
 const url = 'https://scrapegraphai.com/';
 const prompt = 'What does the company do? and ';
 
-const schema = 2;
+const schema = z.object({
+  title: z.string().describe('The title of the webpage'),
+  description: z.string().describe('The description of the webpage'),
+  summary: z.string().describe('A brief summary of the webpage'),
+});
 
 try {
   const response = await smartScraper(apiKey, url, prompt, schema);
   console.log(response.result);
 } catch (error) {
   console.error(error);
-}
+}