docs: update README.md (#126)

## 💸 TL;DR
<!-- What's the three sentence summary of purpose of the PR -->
fix typo

## 📜 Details
documention -> documentation

## 🧪 Testing Steps / Validation
<!-- add details on how this PR has been tested, include reproductions
and screenshots where applicable -->

## ✅ Checks
<!-- Make sure your pr passes the CI checks and do check the following
fields as needed - -->
- [ ] CI tests (if present) are passing
- [ ] Adheres to code style for repo
- [ ] Contributor License Agreement (CLA) completed if not a Reddit
employee

Signed-off-by: Ikko Eltociear Ashimine <[email protected]>

README.md

@@ -40,7 +40,7 @@ Make sure to fork the repository and create a new branch when making changes to
 
 ## When changes are reviewed
 
-We'll try to review your PR as soon as possible within one business week of submission. Small changes or updates to our documention will be faster than changes made to other projects, especially apps. Please note that all not PRs will be accepted and review times may vary.
+We'll try to review your PR as soon as possible within one business week of submission. Small changes or updates to our documentation will be faster than changes made to other projects, especially apps. Please note that all not PRs will be accepted and review times may vary.
 
 # reddit-devplatform-monorepo