Update basic actions workflow example so it does not fail

[Plsr]

In the basic GitHub actions workflow example, install and run bats locally instead of globally.

Why:

When I was following the example provided by the docs, my workflow run would fail:

Run npm install -g bats
npm ERR! code EACCES
npm ERR! syscall mkdir
npm ERR! path /usr/local/share/man/man7
npm ERR! errno -13
npm ERR! Error: EACCES: permission denied, mkdir '/usr/local/share/man/man[7](https://github.com/Plsr/actions-test/actions/runs/8700605027/job/23861082814#step:4:8)'
npm ERR!  [Error: EACCES: permission denied, mkdir '/usr/local/share/man/man7'] {
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'mkdir',
npm ERR!   path: '/usr/local/share/man/man7'
npm ERR! }
npm ERR! 
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user

For reference, this is my failed run and the matching workflow file.

This isn't a great experience for first-time learners.

What's being changed (if available, include any code snippets, screenshots, or gifs):

The proposed solution to this is not installing bats globally:

jobs:
  check-bats-version:
    runs-on: ubuntu-latest
    steps: 
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with: 
          node_version: '20'
      - run: npm install bats
      - run: ./node_modules/bats/bin/bats -v

(Successful workflow, for reference)

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- [ ] For content changes, I have completed the self-review checklist.

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[nguyenalex836]

@Plsr Thanks so much for opening a PR! I'll get this triaged for review ✨