[SYSTEMDS-3190] Do not run workflow for empty checks

[j143]

on:
  push:
    paths-ignore:
      - 'docs/**'
      - '*.md'
      - '*.html'
      - 'src/main/python/docs/**'
      - 'dev/**'

https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#example-ignoring-paths

[Baunsgaard]

LGTM except the documentation test.