gitbook-67: fix:typo

Author: xuelink

README.md

@@ -2,7 +2,7 @@
 description: >-
   An overview of LangX, a free and open-source language exchange app designed to
   connect language learners with native speakers. This document covers the app's
-  features, how it works, and h
+  features, how it works, how to contribute.
 cover: .gitbook/assets/featured-screenshots.jpeg
 coverY: 0
 layout: