docs(guide): Fix typo (#1847)

Author: Turbo87

docs/guide/README.md

@@ -20,7 +20,7 @@ Vue CLI is a full system for rapid Vue.js development, providing:
   - Configurable via in-project config file;
   - Extensible via plugins
 - A rich collection of official plugins integrating the best tools in the frontend ecosystem.
-- A full graphical user intefrace to create and manage Vue.js projects.
+- A full graphical user interface to create and manage Vue.js projects.
 
 Vue CLI aims to be the standard tooling baseline for the Vue ecosystem. It ensures the various build tools work smoothly together with sensible defaults so you can focus on writing your app instead of spending days wrangling with configurations. At the same time, it still offers the flexibility to tweak the config of each tool without the need for ejecting.