docs(nodejs): update Node.js spelling in logs

[EtienneM]

I noticed this while investigating on a support ticket.

I tested on an application and I find it much nicer to read:

-----> Node.js app detected (package.json)
-----> Requested Node.js versions range: 20.15.x
-----> Resolved Node.js version: 20.15.1
-----> Downloading and installing Node.js
TIP: Use npm shrinkwrap to lock down dependency versions
-----> package.json unchanged since last build
-----> Restoring node_modules from cache
-----> Installing Node.js dependencies
npm warn config production Use `--omit=dev` instead.

up to date, audited 1 package in 374ms

found 0 vulnerabilities
-----> Pruning unused Node.js dependencies

up to date, audited 1 package in 276ms

found 0 vulnerabilities
-----> Caching node_modules for future builds
-----> Cleaning up node-gyp and npm artifacts
-----> Building runtime environment
Node.js  v20.15.1