Specify required version for checks

## Description

Could we explicitly specify which version is required for running checks?

Currently, it is not clear from the action configuration/documentation what version is expected, and users may encounter failed checks without understanding the version dependency.

## Suggestion

- Document the required version in the README.
- Validate the version during execution and provide a clear error message if an unsupported version is used.
- Mention minimum and recommended supported versions.

This would make the action easier to configure and troubleshoot.

Start with the README and action configuration to identify the version currently expected for checks. Trace where execution begins and determine how unsupported versions are reported; done means the README states minimum and recommended versions and execution gives a clear validation error.

Written by the indexing model from the issue text.