Simplify action example

[bcomnes]

I thought it would be helpful to people to see an example of a build step in a website but it really just confuses many people.

Sites that build with npm deps should just use the upstream CLI, and action users should just see an example where a folder in a repo gets deployed, with no other steps to confuse the process.

[Len42]

I never used Actions until an hour ago, and I was a bit confused by this. In particular, I wondered if the line "uses: actions/setup-node@v3" would be required to run the deploy action (but apparently not).

Maybe just comment out the build step so it still serves as an example but won't mess things up when someone just copies the yml file verbatim.