Fixed a typo (#1625)

Removed an extra 's' to fix a grammatical mistake

Author: aabounegm

src/v2/guide/installation.md

@@ -75,7 +75,7 @@ In the [`dist/` directory of the NPM package](https://cdn.jsdelivr.net/npm/vue/d
 
 ### Terms
 
-- **Full**: builds that contains both the compiler and the runtime.
+- **Full**: builds that contain both the compiler and the runtime.
 
 - **Compiler**: code that is responsible for compiling template strings into JavaScript render functions.