Update the Lint workflow to use PHP 8.2

[mr-vara]

Proposed changes

Description:

This PR updates the GitHub workflow to use PHP 8.2 to resolve compatibility issues with symfony/finder and wp-cli/wp-cli.

Changes:

• Updated the GitHub Actions workflow to set up PHP 8.2.
• Ensured compatibility with dependencies that require PHP >=8.2.

Reason for Change:

Previously, the workflow was using PHP 7.4, which caused dependency conflicts, particularly with symfony/finder v7.2.2, which requires PHP 8.2. This resulted in the following error:

Your lock file does not contain a compatible set of packages. Please run composer update.

By updating the workflow to use PHP 8.2, these conflicts are resolved without modifying the composer.json or composer.lock files.

Impact:

• Fixes build failures in GitHub Actions.
• Ensures compatibility with required PHP versions.