Update README.md

[u0uo]

typo correction, line 5

Closes #

💸 TL;DR

Typo correction on line 5.

📜 Details

Design Doc

Jira

🧪 Testing Steps / Validation

✅ Checks

• [ ] CI tests (if present) are passing
• [ ] Adheres to code style for repo
• [ ] Contributor License Agreement (CLA) completed if not a Reddit employee