chore(deps): bump express from 4.x to 5.x in hash-server sample to fix qs vulnerability

Agent-Logs-Url: https://github.com/crispthinking/athena-nodejs-client/sessions/36ef5b4a-25ce-4aaf-8553-616a1fa8b70f

Co-authored-by: corpo-iwillspeak <265613520+corpo-iwillspeak@users.noreply.github.com>

Author: Copilot