In Next.js the instrumentation.ts file needed to be in src if it exis… (

#1157)

* In Next.js the instrumentation.ts file needed to be in src if it exists https://vercel.com/docs/observability/otel-overview

* fix formatting of src

site/content/docs/traces-open-telemetry/instrumenting-code/nextjs.md

@@ -48,7 +48,8 @@ const nextConfig = {
 module.exports = nextConfig
 ```
 
-Create a file called `instrumentation.ts` at the root of your project and add the following code:
+Create an `instrumentation.ts` file in the root of your project, or, place in the `src` directory if you are using one.
+And add the following code:
 
 ```ts {title="instrumentation.ts"}
 import { registerOTel } from '@vercel/otel'