Update 10.deployment.md

When deploy with .js extend got malformatted error in pm2:
[PM2][ERROR] File ecosystem.config.js malformated
Error [ERR_REQUIRE_ESM]

this error is fix when i using .cjs extension intead

docs/1.getting-started/10.deployment.md

@@ -40,7 +40,7 @@ It respects the following runtime environment variables:
 
 To use `pm2`, use an `ecosystem.config.js`:
 
-```ts [ecosystem.config.js]
+```ts [ecosystem.config.cjs]
 module.exports = {
   apps: [
     {