Use relative paths instead of absolute paths in CLI version checker

Changed all file path references from absolute paths
(/home/runner/work/gh-aw/gh-aw/pkg/constants/constants.go) to
relative paths (./pkg/constants/constants.go) as requested.

This makes the workflow more portable and cleaner.

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot