Fix YAML syntax errors in GitHub Actions workflows

[d-oit]

Summary

• enhanced-ci.yml: Corrected indentation and conditional logic to resolve YAML parsing errors.
• optimized-ci.yml: Fixed multi-line string handling in job steps to prevent syntax issues.
• _quality-checks.yml: Updated the auto-fix script to use a here document for commit messages, avoiding YAML multi-line string problems.

These fixes ensure the GitHub Actions workflows run without syntax errors, improving CI/CD reliability. This change prepares the repository for the v0.2.3 release.