Fix invalid YAML syntax in README usage example

[jozefizso]

Problem

The README contains invalid YAML syntax in the usage example that will cause workflow failures for users who copy it.

Current code (README.md:15):

on:
  - push:

This is invalid YAML. The on: trigger should not use a list format with a dash when specifying event configuration.

Solution

Choose one of these valid formats:

Option 1 - Simple trigger (recommended):

on:
  push:

Option 2 - Multiple events:

on: [push, pull_request]

Option 3 - List format (if using multiple events):

on:
  - push
  - pull_request

Impact

Users copying the README example will encounter workflow syntax errors. This should be fixed before v1.0.0 release to ensure good first-user experience.

References

• GitHub Actions workflow syntax documentation