Clean README encoding artifacts and improve readability

Agent-Logs-Url: https://github.com/thecoder8890/forward-deployed-engineer-roadmap/sessions/1cce489b-0ce5-47df-8bd6-25845c4c4fda

Co-authored-by: thecoder8890 <33773206+thecoder8890@users.noreply.github.com>

Author: Copilot