Added puppeteer imports to the puppeteer trigger.config snippets

docs/config/config-file.mdx

@@ -482,6 +482,7 @@ To use Puppeteer in your project, add these build settings to your `trigger.conf
 
 ```ts trigger.config.ts
 import { defineConfig } from "@trigger.dev/sdk/v3";
+import { puppeteer } from "@trigger.dev/build/extensions/puppeteer";
 
 export default defineConfig({
   project: "<project ref>",

docs/guides/examples/puppeteer.mdx

@@ -23,6 +23,7 @@ To use all examples on this page, you'll first need to add these build settings
 
 ```ts trigger.config.ts
 import { defineConfig } from "@trigger.dev/sdk/v3";
+import { puppeteer } from "@trigger.dev/build/extensions/puppeteer";
 
 export default defineConfig({
   project: "<project ref>",