📝 Fix typo in AGENTS.md

agents/AGENTS.md

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 - Use tmux for background jobs, async tasks, or anything you'll come back to it. E.g:
   - Run development servers, long running processes you need to audit, run tests in the background, tailing logs
 - Design workflows so they are observable without constant (blocking) babysitting (use tmux panes, logs, log-tail scripts, ...)
-- Never use em dashes (—), en dashes (–), or semicolons (;). Restructure sentences instea. Use periods, commas, or parentheses
+- Never use em dashes (—), en dashes (–), or semicolons (;). Restructure sentences instead. Use periods, commas, or parentheses
 - No flowery language, no "I'd be happy to", no "Great question!"
 
 ## Git