docs: fix guide to properly reflect ash getting started guide basis · ash-project/ash_json_api@cb47451

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v3, actions/cache@v3, actions/upload-artifact@v3. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Unexpected input(s) 'use-cache?', valid inputs are ['git-token', 'mix-env', 'working-directory', 'use-cache', 'cache-prefix']

Unexpected input(s) 'use-cache?', valid inputs are ['git-token', 'mix-env', 'working-directory', 'use-cache', 'cache-prefix']

The following artifacts were uploaded using a version of actions/upload-artifact that is scheduled for deprecation: "github-pages". Please update your workflow to use v4 of the artifact actions. Learn more: https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

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