Update to prevent netlify#55 from occurring again

This change in the readme is to help future developers not have binary issues across lambda functions created by the next build command.

Author: garrypolley

README.md

@@ -60,7 +60,7 @@ It's super simple. Just create a `next.config.js` file and write the following:
 
 module.exports = {
   // Target must be serverless
-  target: "serverless",
+  target: "experimental-serverless-trace",
 };
 ```