README.md npm build reports unknown command

[samreid]

Following the instructions on the readme:

If you want to build a local version run npm build, it will create the files in the dist folder.

I ran:

git clone https://github.com/concord-consortium/codap-plugin-api.git
cd codap-plugin-api/
npm install

then when running

npm build

I received this error:

~/phet/root/codap-plugin-api$ npm build
Unknown command: "build"

Did you mean this?
    npm run build # run the "build" package script

To see a list of supported npm commands, run:
  npm help

I am using node v20.10.0 and npm 10.2.3.

Running npm run build succeeded.

Tagging as related to phetsims/projectile-data-lab#232